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Open AccessArticle

Isolation, Characterization, Crystal Structure Elucidation of Two Flavanones and Simultaneous RP-HPLC Determination of Five Major Compounds from Syzygium campanulatum Korth

1
Department of Pharmaceutical Chemistry, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-Minden, Penang, Malaysia
2
EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-Minden, Penang, Malaysia
3
Department of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800-Minden, Penang, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Isabel C. F. R. Ferreira
Molecules 2015, 20(8), 14212-14233; https://doi.org/10.3390/molecules200814212
Received: 24 May 2015 / Accepted: 6 July 2015 / Published: 4 August 2015
(This article belongs to the Collection Bioactive Compounds)
Two flavanones named (2S)-7-Hydroxy-5-methoxy-6,8-dimethyl flavanone (1), (S)-5,7-dihydroxy-6,8-dimethyl-flavanone (2), along with known chalcone, namely, (E)-2ʹ,4ʹ- dihydroxy-6ʹ-methoxy-3ʹ,5ʹ-dimethylchalcone (3) and two triterpenoids, namely, betulinic and ursolic acids (4 and 5), were isolated from the leaves of Syzygium campanulatum Korth (Myrtaceae). The structures of compounds (1 and 2) were determined on the basis of UV-visible, FTIR, NMR spectroscopies and LC-EIMS analytical techniques. Furthermore, new, simple, precise, selective, accurate, highly sensitive, efficient and reproducible RP-HPLC method was developed and validated for the quantitative analysis of the compounds (1–5) from S. campanulatum plants of five different age. RP-HPLC method was validated in terms of specificity, linearity (r2 ≤ 0.999), precision (2.0% RSD), and recoveries (94.4%–105%). The LOD and LOQ of these compounds ranged from 0.13–0.38 and 0.10–2.23 μg·mL−1, OPEN ACCESS respectively. Anti-proliferative activity of isolated flavanones (1 and 2) and standardized extract of S. campanulatum was evaluated on human colon cancer (HCT 116) cell line. Compounds (1 and 2) and extract revealed potent and dose-dependent activity with IC50 67.6, 132.9 and 93.4 μg·mL−1, respectively. To the best of our knowledge, this is the first study on isolation, characterization, X-ray crystallographic analysis of compounds (1 and 2) and simultaneous RP-HPLC determination of five major compounds (1–5) from different age of S. campanulatum plants. View Full-Text
Keywords: Syzygium campanulatum Korth; secondary metabolites; X-ray crystallography; RP-HPLC Syzygium campanulatum Korth; secondary metabolites; X-ray crystallography; RP-HPLC
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Memon, A.H.; Ismail, Z.; Al-Suede, F.S.R.; Aisha, A.F.A.; Hamil, M.S.R.; Saeed, M.A.A.; Laghari, M.; Majid, A.M.S.A. Isolation, Characterization, Crystal Structure Elucidation of Two Flavanones and Simultaneous RP-HPLC Determination of Five Major Compounds from Syzygium campanulatum Korth. Molecules 2015, 20, 14212-14233.

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