Search Results (774)

Previous studies indicate that the alkali-induced oxidation of quercetin (Que) or kaempferol (Kae) converts them into hydroxylated-benzoyl-benzofuranones (BZFs), a type of metabolite whose antioxidant potency is substantially higher. To explore whether the former conversion can take place under a more biologically relevant oxidizing setting, these flavonols were incubated in a nitrite-containing acidic medium. Under such condition, the concentrations of Que or Kae rapidly decayed, simultaneously generating their corresponding BZFs. When Que and Kae were co-incubated, the depletion of the parent flavonols accelerated without changes in BZF formation. Similar results were observed when either Que or Kae were incubated with some of their corresponding 3-O-glycosides. In turn, when Que was co-incubated with certain flavanols or phenolic acids, the latter compounds nearly doubled not only the oxidative disappearance of Que but also its BZF formation. Interestingly, the concentrations of Que-BZF and Kae-BZF reached under all former incubation scenarios are greater than those previously reported to be needed to protect intestinal epithelial cells against the oxidative and lytic damage induced by ROS. We suggest that, if these conversions also took place in vivo, the gastric fluid could be potentially seen as a chemical milieu where the antioxidant properties of Que and Kae could be enormously amplified. Full article

Background/Objectives: Rumex obtusifolius L. (Polygonaceae) has been traditionally used to treat various disorders, including hepatic and gastrointestinal diseases. However, the phytochemical constituents of its roots and their potential protective effects against skeletal muscle atrophy remain poorly understood. This study aimed to isolate and characterize bioactive constituents from R. obtusifolius roots and evaluate their protective effects against dexamethasone (DEX)-induced muscle atrophy in C2C12 myotubes. Methods: LC–MS-guided phytochemical investigation of the ethanol extract of R. obtusifolius roots, followed by successive column chromatography and HPLC purification, resulted in the isolation of four naphthalene-type glycosides. Their structures were elucidated using 1D and 2D NMR spectroscopy, HR-ESIMS, and chemical transformation. The protective effects of compounds 1 and 4 against dexamethasone (DEX)-induced muscle atrophy were evaluated by assessing myotube morphology, myogenic and atrophy-related protein expression, and PI3K/Akt/mTOR signaling. Results: A new naphthalene malonylglucoside, nepodin-8-O-β-D-(6′-O-malonyl)-glucopyranoside (1), together with three known glycosides (2–4), was identified. Among the isolated compounds, compound 1 significantly attenuated DEX-induced muscle atrophy in a concentration-dependent manner by increasing myotube diameter and improving myotube morphology. It restored the expression of the myogenic markers MyoD and myogenin while suppressing the atrophy-related proteins MuRF1 and MAFBX. Furthermore, compound 1 reversed DEX-induced suppression of the PI3K/Akt/mTOR signaling pathway, indicating recovery of anabolic signaling. Conclusions: This study reports a new naphthalene malonylglucoside (1) from R. obtusifolius roots and demonstrates that compound 1 protects against DEX-induced skeletal muscle atrophy through restoration of myogenic differentiation and activation of the PI3K/Akt/mTOR pathway. These findings suggest that compound 1 is a promising natural lead compound for the development of therapeutics targeting muscle wasting disorders. Full article

Background: Buddleja globosa Hope (matico) is a Chilean medicinal plant traditionally used in Mapuche and Aymara ethnomedicine. However, no systematic synthesis of its phytochemical composition and pharmacological evidence has been previously reported. Methods: A PRISMA 2020-compliant systematic review was conducted using Google Scholar, PubMed, EBSCOhost, and Springer Nature databases from inception to March 2026. Studies reporting phytochemical characterization and/or biological activities of B. globosa were included. Methodological quality was assessed using an adapted five-criterion tool for non-clinical studies. The protocol was registered in OSF. Results: Fourteen studies (1989–2026), mainly from Chilean research groups, identified 27 bioactive compounds across leaves, roots, and flowers. These included phenylethanoid glycosides (e.g., verbascoside/acteoside, echinacoside, forsitoside B, and linarin), flavonoids (luteolin 7-O-glucoside, apigenin 7-O-glucoside, myricetin, catechin, and epicatechin), pentacyclic triterpenes (α/β-amyrins and β-sitosterol), iridoid glycosides, and clerodane diterpenoids (buddledines A–C), as well as four newly reported phenylethanoids. Antioxidant activity was the most frequently evaluated endpoint (11/14 studies), mainly mediated through hydrogen atom transfer and single-electron transfer mechanisms linked to caffeoyl and flavonoid structures. Anti-inflammatory effects (five studies) involved COX and 5-LOX inhibition and reduced PGE₂ production in LPS-stimulated macrophages. Additional reported activities included antihepatotoxic, antiplatelet, wound-healing, antibacterial, and antifungal effects. Conclusions:B. globosa exhibits a coherent phytochemical profile supporting strong preclinical antioxidant and anti-inflammatory activities. The main limitation for clinical translation is the low oral bioavailability of phenylethanoid glycosides. Nanoformulation strategies, investigation of colonic metabolites, and topical delivery systems represent promising approaches to bridge the preclinical-to-clinical gap. Full article

Lead (Pb) induces oxidative stress, inflammation, and hepatorenal injury. We evaluated whether fenugreek (Trigonella foenum-graecum) seed powder (200 mg/kg) protects against subchronic Pb-acetate exposure in male albino mice. Sixty mice were randomized to six groups (n = 10): control (G1), fenugreek-only (G2), Pb 150 mg/kg (G3), and three co-exposure groups receiving fenugreek with Pb at 50, 100, and 150 mg/kg (G4–G6), gavaged daily for 8 weeks. LC–DAD–ESI–MS/MS of the seed batch tentatively identified 32 metabolites, dominated by flavonoid C-glycosides, luteolin dihydrogalloyl-glucosyl-pentosyl glucoside (15.90%), vicenin-3 (14.46%), vicenin-2 (9.66%), vicenin-1 (8.80%), kaempferol 7-O-rhamnosyl-glucoside (8.71%), with additional acylated phenolic conjugates. Pb exposure (G3) significantly reduced growth and intake, elevated serum ALT, AST, ALP, urea, and creatinine, raised blood Pb, and produced hepatic necrosis, vacuolation, and inflammation. Molecularly, Pb upregulated Nrf2, HO-1, SCD-1, TNF-α, and IL-6 and suppressed SOD-3. Fenugreek co-treatment attenuated all these changes across the three Pb doses, with greatest effect at the lowest Pb load (G4). Notably, fenugreek co-treatment reduced rather than further increased Nrf2 and HO-1 expression relative to Pb alone, a pattern most consistent with lowering the upstream oxidative stimulus rather than direct induction of these pathways. The seed’s polyphenolic profile—rich in vicenin-type C-glycosides and luteolin and kaempferol derivatives—offers a plausible chemical basis for the antioxidant, anti-inflammatory, and modest Pb-lowering effects observed; however, because whole seed powder was administered and metabolite identifications are tentative, these structure–activity relationships are presented as hypotheses for future bioactivity-guided fractionation rather than as demonstrated mechanisms. These preclinical findings support further investigation of fenugreek as a candidate dietary adjunct against environmental Pb exposure, contingent on protein-level validation, pharmacokinetic characterization, benchmarking against a standard chelator, and bioactivity-guided fractionation. Full article

Artemisia campestris is a medicinal plant species endemic to Algeria, particularly abundant in the southern regions and the central Sahara. Its long-standing use in traditional medicine has recently gained scientific attention, prompting further investigation into its bioactive potential. This study focuses on the phytochemical composition and biological activity of its hydromethanolic extract, with a particular emphasis on its ability to inhibit neural enzymes associated with insect physiology with particular relevance to Aphis gossypii (Glover), a major polyphagous agricultural pest. Preliminary screening revealed a diverse array of secondary metabolites, including tannins (catechic and gallic), flavonoids, quinones, glycosides, terpenoids, saponins, coumarins, and alkaloids; however, anthocyanins were not detected. Quantitative analysis confirmed high concentrations of total phenolics (80.91 ± 1.58 mg GAE/g), flavonoids (60.45 ± 2.02 mg RE/g), phenolic acids (4.24 ± 0.38 mg CAE/g), and condensed tannins (2.26 ± 0.29 mg CE/g). Enzyme inhibition assays were performed using Ellman’s method, and IC₅₀ values were calculated by nonlinear regression analysis based on dose–response curves. The extract demonstrated significant in vitro inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), with IC₅₀ values of 13.79 ± 0.79 µg/mL and 8.34 ± 0.58 µg/mL, respectively. Molecular docking analyses further confirmed strong binding affinities of cyanidin-3-O-glucoside, malvidin-3-O-glucoside, and apigenin (−8.20 to −8.50 kcal/mol) with the AChE active site, stabilized by hydrogen bonding and π–π interactions with key residues. These results were benchmarked against galantamine, a reference inhibitor, which exhibited IC₅₀ values of 1.50 ± 0.12 µg/mL under the same conditions. Although galantamine showed superior potency, the relatively low IC₅₀ values of the A. campestris extract support its potential as a natural cholinesterase-inhibitory agent warranting further investigation. These findings suggest that A. campestris may represent a promising source of natural cholinesterase inhibitors with potential relevance for eco-friendly insect control. These in vitro and in silico findings provide a mechanistic rationale warranting future in vivo bioassay validation against A. gossypii and related agricultural pests. Full article

Phytochemical studies performed on the aerial parts of Teucrium davaeanum Coss. resulted in the isolation of an iridoid diglycoside, teucardoside; two phenylethanoid triglycosides, poliumoside and 3-O-methyl-poliumoside; a flavon C-diglycoside, vicenin-2 (apigenin-6,8-di-C-glycoside); and a newly described bisdesmosidic oleanane-type triterpene saponin, davaeanoside. Structure elucidations of all isolated metabolites are based on extensive spectroscopic analysis and chemical derivatizations. The extract and isolated compounds (1–5) were tested for α-amylase and α-glucosidase inhibitory activity. IC50 values were measured for all extracts and compounds and compared against acarbose. Results revealed weak or moderate α-amylase and α-glucosidase inhibitory activity at the tested concentrations of the isolated compounds, especially compound 5. However, these findings do not exclude antidiabetic activity mediated by other mechanisms such as modulation of insulin signaling, enhancement of glucose uptake, or antioxidant effects. Further studies are warranted to explore these potential pathways. In addition, the essential oils of T. davaeanum and T. zanonii were obtained by hydrodistillation and simultaneously analyzed by GC-FID and GC/MS. The major compounds of T. davaeanum essential oil were germacrene D (31.4%) and bicyclogermacrene (15.9%); the main compounds of T. zanonii were β-pinene (19.5%), α-muurolene (13.4%), oxo-7,8-dihydro-β-ionol (9.2%), and α-pinene (6.9%). Full article

Skin aging is associated with oxidative stress, extracellular matrix degradation, and dysregulation of melanogenesis, leading to wrinkles, loss of elasticity, and hyperpigmentation. Natural plant-derived compounds have attracted increasing interest as multifunctional cosmetic ingredients due to their antioxidant and anti-aging properties. Mai-Kae-Den-Klong (MKDK), a traditional Thai longevity herbal formula composed of Albizia procera (Roxb.) Benth., Cyperus rotundus L., Diospyros rhodocalyx Kurz, Piper nigrum L., Streblus asper Lour., and Tinospora crispa (L.) Hook.f. & Thomson, has historically been used to promote vitality and healthy aging; however, its potential application as a cosmetic anti-aging ingredient remains scientifically unexplored. Therefore, this study investigated the anti-aging potential of MKDK extract using integrated enzyme-based bioassays and in silico approaches. Phytochemical profiling of the ethanolic extract was performed using LC-MS analysis, revealing diverse bioactive constituents, including flavonoids, phenolic glycosides, alkaloids, and terpenoids, with (−)-epicatechin, procyanidin B1, and piperine identified as major metabolites. Antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays, while inhibitory activities against tyrosinase, collagenase, elastase, and hyaluronidase were assessed to determine skin anti-aging potential. The extract exhibited strong antioxidant activity, with IC₅₀ values of 17.23 ± 2.11 µg/mL for DPPH and 11.87 ± 1.77 µg/mL for ABTS assays. In addition, the extract demonstrated inhibitory effects against tyrosinase (IC₅₀ = 41.25 ± 1.56 µg/mL), elastase (IC₅₀ = 49.51 ± 3.69 µg/mL), collagenase (IC₅₀ = 61.54 ± 2.88 µg/mL), and hyaluronidase (IC₅₀ = 63.74 ± 6.32 µg/mL), suggesting multifunctional anti-aging properties associated with skin brightening and extracellular matrix preservation. Network pharmacology analysis predicted multiple aging-related signaling pathways, particularly the FoxO signaling pathway, which is associated with oxidative stress regulation and longevity. Molecular docking analysis further demonstrated favorable binding affinities of procyanidin B1, epicatechin, and piperine toward skin-aging-related enzymes, supporting their potential contribution to the observed bioactivities. Overall, these findings suggest that MKDK possesses promising cosmeceutical potential as a natural multifunctional anti-aging ingredient and provides scientific support for the application of traditional Thai herbal formulations in cosmetic and skin health products. Full article

Trichothecenes are the most common Fusarium mycotoxin contaminants of grains and their related products. Searching for effective adsorbents remains a major challenge in mycotoxicology, due to the low polarity and bulky chemical structure of type A trichothecenes. This study aimed to investigate in silico chitosan binding to type A trichothecenes such as diacetoxyscirpenol (DAS), neosolaniol (NEO), T-2 toxin (T2), and HT-2 toxin (HT2) and to study in vitro the devil fish chitosan biosorption capacity under two pH conditions (pHs 3 and 8). Molecular dynamic experiments showed that the chitosan monomers D-glucosamine and N-acetyl-D-glucosamine mostly bound to trichothecenes through the O in hydroxyls and glycosidic bonds and through their functional groups containing nitrogen. DAS exhibited a 9.44-, 6.39-, and 4.54-fold increase in the number of intermolecular contacts with chitosan compared to NEO, HT2 and T2, respectively. Moreover, in vitro experiments showed that at pH 3, chitosan exhibited a significant DAS sorption efficiency of 31.60% (p < 0.005), corresponding to a mass-normalized sorption capacity of 126.4 ng/mg. In contrast, no significant differences in sorption were observed at pH 8 (p > 0.05). Regarding NEO, T2, and HT2, no significant adsorption was detected under either pH condition (p > 0.05). This study is the first attempt to elucidate chitosan’s capacity to bind DAS and propose a mechanism for that interaction. Full article

This study aims to systematically elucidate the influence of various heat treatment methods on the phenolic compounds in highland barley and their potential antihypertensive processes via chemical, in vitro bioactivity, and bioinformatics prediction analyses. This work employed UHPLC-Q Exactive HFX-MS/MS targeted metabolomics technology to ascertain metabolites in barley treated with five different thermal conditions: steaming (ST), boiling at atmospheric pressure (BO), boiling at high pressure (PO), extrusion puffing (EX), and sand-roasting (SR). The data revealed 252 phenolic metabolites, comprising 19 phenolic acids and 233 flavonoids. Moreover, it was observed that, in comparison to the untreated group, various heat treatments yielded substantial differences in the profiles of phenolic compounds. Notably, extrusion puffing (EX) exhibited superior performance: it increased specific flavonoid glycosides such as Clitorin and Quercetin 3-O-rutinoside-(1-2)-O-rhamnoside, while also improving direct antioxidant capabilities such as DPPH and FRAP. In addition, network pharmacology analysis of differentially expressed metabolites in the puffed group identified 44 potential targets, including TNF, IL-6, MMP-9, HIF-1A, and ACE. The KEGG and GO enrichment analyses revealed a substantial enrichment of these targets in classic hypertension-related pathways, including lipid metabolism, atherosclerosis and fluid shear stress. The molecular docking findings indicated that Apigenin 7-O-(2G-rhamnosyl) gentiobioside had significant binding affinities for the target proteins MMP9 and ACE. This study demonstrated that EX is an efficient processing method, with highland barley polyphenols showing potential antihypertensive activity. The findings provide a novel theoretical foundation and research direction for optimizing highland barley processing to maximize functional component utilization and elucidate its food-derived antihypertensive mechanisms. Full article

Steroid glycosides constitute an important class of bioactive molecules, yet their selective synthesis remains challenging. Here, we established a screening platform for nucleotide sugar-dependent glycosyltransferases (GTs) coupled with sucrose synthase (SuSy) for in situ UDP-glucose regeneration, enabling cost-efficient steroid glucosylation. A library of GTs comprising literature-derived enzymes and newly mined archaeal and fungal candidates was constructed using sequence filtering, AlphaFold3 modeling, and docking-guided prioritization. The resulting panel was screened against 31 structurally diverse steroids (androgens, estrogens, pregnanes, and corticosteroids) using crude Escherichia coli lysates as catalysts and UPLC-DAD, LC-MS and NMR analytics. YjiC and OleD glycosyltransferases emerged as the most promiscuous biocatalysts, while Sbaic7OGT and SgUGT74AC1_M7 displayed greater selectivity toward estrogens and selected testosterone derivatives. Product assignment for representative reactions was validated using authenticated reference standards or NMR (1D/2D) analysis, confirming regioisomeric estradiol monoglucosides (3-O- and 17-O-), estrone 3-O-glucoside, and an unexpected product diversification for 17α-testosterone by endogenous E. coli enzyme, where the major product was identified as a 6′-O-acetylated glucoside. Finally, SuSy-coupled cascades were applied in semi-preparative scale and evaluated under optimized conditions and co-immobilization formats. Full article

Ougan (Citrus suavissima Hort. et Tanaka) is valued for its distinctive sweet–bitter flavor and nutritional properties; however, tissue-resolved metabolic differences between two cultivar forms (seeded and seedless) of Ougan (C. suavissima) remains poorly understood. In this study, a comprehensive UPLC-MS/MS-based metabolomic analysis was conducted on peel (SP and NP), pulp (SF and NF), segment membrane (SM and NM) and seed tissues (SS, from seeded fruit only) of seeded and seedless Ougan fruits. A total of 1333 metabolites were annotated, with flavonoids (48.53%) and phenolics (12.25%) representing the predominant compound classes. Tissues specificity was the primary determinant of metabolic variation, with peel and segment membrane tissue showing relatively high abundance (fold change ≥ 2, |Log₂FC| ≥ 1) of phenylpropanoid- and flavonoid-derived metabolites. Comparative analysis between seeded and seedless tissues revealed significant modulation of phenylpropanoid biosynthesis, flavonoid biosynthesis, phenylalanine metabolism, and related secondary metabolite pathways. Seeded tissues showed a higher relative abundance of selected flavonol glycosides (6-hydroxykaempferol-3,6-O-diglucoside), hydroxycinnamic acid derivatives, and santhocyanin-related compounds, whereas seedless tissues showed higher relative abundance of selected flavanones and malonylated flavonoid glycosides. Seeds were characterized by high limonin content, consistent with limonoid-associated bitterness chemistry. Overall, our findings provide a tissue-resolved metabolomic framework for understanding quality-associated secondary metabolite variation in mature Ougan fruit. Full article

Background/Objectives: Alzheimer’s disease (AD) is characterized by beta-amyloid (Aβ) plaque deposition, which impairs several cellular processes, including autophagy. Considering the multifactorial nature of AD, the development of therapies acting on alternative molecular targets is necessary. In this study, we evaluated the neuroprotective effect of a molecule from the hydrozoan Eudendrium carneum and investigated its impact on autophagy-related pathways. Methods: The secretion of E. carneum was fractionated by RP-HPLC according to its neuroprotective activity in SH-SY5Y cells exposed to oAβ42, evaluated using LDH and MTT assays. The purified molecule (named EC5), characterized by mass spectrometry, was evaluated regarding in silico toxicity and calcium dynamics. Neuronal lysosomal morphology was assessed using the LysoTracker probe, and cathepsin D activity was determined using a synthetic substrate. The expression of autophagy-related proteins (mTOR, LAMP-1, and LC3B) was evaluated by dot blotting, and amyloid plaque clearance was quantified using Thioflavin-T staining. Results: The steroid glycoside putatively identified as Sarmentoside B (EC5) exhibited neuroprotective effects and showed no toxicity or alterations in neuronal calcium or sodium channel dynamics. EC5 restored lysosomal morphology and cathepsin D activity, reversing the impairment induced by oAβ42. Furthermore, EC5 reduced mTOR expression, and this interaction was supported by molecular docking analysis. Lysosomal restoration promoted the clearance of oAβ42 aggregates, as evidenced by Thioflavin-T staining, resulting in reduced neuronal death. Conclusions: EC5, putatively identified as Sarmentoside B, exerts neuroprotective effects against oAβ42-induced toxicity by promoting autophagy-related amyloid clearance, highlighting its therapeutic potential for AD. Full article

Qualitative liquid chromatography–mass spectrometry (UHPLC–MS) and NMR analysis of the diethyl ether extract of the aerial part of Eryngium dichotomum plant belonging to the Apiaceae family led to the putative identification of phenolic acids, flavonoid glycosides, triterpenoid saponins, fatty acids, and oxylipins. The tentative identification of several secondary metabolites by UHPLC–MS analysis was further confirmed by compound isolation and comprehensive spectroscopic characterization using 2D NMR and mass spectrometry, leading to the elucidation of seven compounds, a mixture of two hydroxy fatty acids, namely (Z,E)-13-hydroxyoctadeca-9,11-dienoic acid (1) and (E)-13-hydroxyoctadec-11-enoic acid (2); two C17 polyacetylenes, (E)-heptadeca-1,10-dien-4,6-diyne-3,8,9-triol (3), and falcarinol ((Z)-1,9-heptadeca-1,9-dien-4,6-diyn-3-ol) (4); glycerol monopalmitate (5) and two flavonoid glycosides, kaempferol 3-O-β-D-glucopyranosyl-(1 → 6)-O-β-D-galactopyranoside (6), and quercetin 3-O-β-D-glucopyranosyl-(1 → 6)-O-β-D-galactopyranoside (7). Furthermore, the antioxidant activity of the n-butanol and the diethyl ether extracts of the species were evaluated using the DPPH, FRAP, and ABTS assays. In addition, the anticancer activity of the major falcarinol-type polyacetylene was assessed against A375 human melanoma cells. Full article

Background: Ensuring authenticity and verifying the floral origin of honey are persistent and critical issues in the quality control of bee products; in particular, the characteristic components and practical authenticity evaluation standards of several specialty fruit monofloral honeys are still insufficiently defined. Methods: To address this, we conducted a comparative analysis of five fruit monofloral honey (loquat, pomegranate, citrus, apple, and blueberry) phytochemicals using high-performance liquid chromatography (HPLC), liquid chromatography–mass spectrometry (LC-MS), and the Similarity Evaluation System for Chromatographic Fingerprint of Traditional Chinese Medicine (TCM). Results: Based on the currently available literature and databases, eleven identified phytochemicals appear to be reported in honey for the first time, including quinic acid derivatives, phenolamides, and flavonoid glycosides. Characteristic components with high species dependence were identified in distinct honey samples: anisic acid in loquat honey; methyl syringate in pomegranate honey; caffeine in citrus honey; cinnamic acid and methyl syringate in apple honey; and phaseic acid, methyl syringate, isorhamnetin-3-O-neohesperidoside, and callunene in blueberry honey. Twenty-three commercial samples were collected from the retail market to assess authenticity using HPLC fingerprints and quantitative thresholds for characteristic components. Authenticity was assessed based on both chromatographic fingerprint similarity and the content thresholds of characteristic phytochemicals specific to each monofloral honey type. The results indicated that 19 commercial samples satisfied the proposed authenticity criteria, whereas four commercial samples showed inconsistencies in characteristic phytochemical profiles or fingerprint similarity. Conclusions: This research establishes reliable chemical markers and a quantitative method to assess the authentication of five monofloral honeys, supporting high-value product development. Full article

Rosehip (the “fruit” of Rosa canina L, commonly known as dog rose) is an emerging functional food, yet native Greek populations remain under-explored. This study screened 76 wild genotypes from Northern Greece for radical scavenging activity (% RSA), total phenolic content (TPC), and ascorbic acid (AsA). The results showed remarkable antioxidant potential (RSA > 70%), with TPC ranging from 1.02 to 35.96 mg g⁻¹ DW, and AsA between 0.72 and 3.57 mg g⁻¹ FW. Stepwise multiple regression analysis identified altitude as the primary predictor for RSA (adjusted R² = 0.139, p = 0.001) and latitude as a significant modulator for TPC (p = 0.034), reflecting subtle environmental adaptations over a robust genetic baseline. HPLC-PDA-MS characterization revealed a complex profile dominated by procyanidins, catechin derivatives, flavanonols (eriodictyol conjugates), and flavonol 3-O-glycosides (mainly quercetin hexosides and pentosides). Exploratory multivariate analysis (PCA) visualized high phenotypic plasticity and identified elite chemotypes (e.g., RPK-5, RCZ-12). Notably, the Rhodopi population exhibited the most extensive multidimensional dispersion despite its geographically restricted collection radius, suggesting a diverse local genetic reservoir. These findings establish a phytochemical map of Greek dog rose germplasm, providing essential criteria for selecting high-quality genotypes for future domestication and exploitation in the nutraceutical and pharmaceutical sectors. Full article