Next Article in Journal
A Novel Aqueous Two Phase System Composed of a Thermo-Separating Polymer and an Organic Solvent for Purification of Thermo-Acidic Amylase Enzyme from Red Pitaya (Hylocereus polyrhizus) Peel
Previous Article in Journal
In Silico Docking, Molecular Dynamics and Binding Energy Insights into the Bolinaquinone-Clathrin Terminal Domain Binding Site
Article Menu

Export Article

Open AccessArticle
Molecules 2014, 19(5), 6623-6634; https://doi.org/10.3390/molecules19056623

New Flavanol and Cycloartane Glucosides from Landoltia punctata

Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
*
Authors to whom correspondence should be addressed.
Received: 26 February 2014 / Revised: 14 May 2014 / Accepted: 16 May 2014 / Published: 22 May 2014
(This article belongs to the Section Natural Products Chemistry)
Full-Text   |   PDF [302 KB, uploaded 18 June 2014]   |  

Abstract

Chemical investigation on the constituents of Landoltia punctata led to the isolation and identification of 17 compounds, four of which were new and identified as (3b,24S)-9,19-cycloartane-3,22,24,25-tetraol 3-O-[b-D-glucopyranosyl-(1→2)]-[b-D-glucopyranosyl-(1→6)]-b-D-glucopyranoside (1), (3b,24S)-9,19-cycloartane-3,24,25-triol 3-O-[b-d-glucopyranosyl-(1→2)]-[b-D-glucopyranosyl-(1→6)]-b-D-glucopyranoside (2), 3,4'-dihydroxy-7,3'-dimethoxyflavan-5-O-b-D-glucopyranoside (3) and 3,4'-dihydroxy-4,7,3'-trimethoxyflavan-5-O-b-D-glucopyranoside (4). Their structures were elucidated by spectroscopic, chemical, and biochemical methods. Thus, cycloartane triterpenoids were discovered in the Lemnaceae family for the first time. Compound 3 showed antioxidant capacity in the positively charged 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid radical (ABTS+•) and superoxide anion radical scavenging assays. View Full-Text
Keywords: Landoltia punctata; flavanol glucoside; cycloartane glucoside; antioxidant Landoltia punctata; flavanol glucoside; cycloartane glucoside; antioxidant
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Wang, N.; Xu, G.; Fang, Y.; Yang, T.; Zhao, H.; Li, G. New Flavanol and Cycloartane Glucosides from Landoltia punctata. Molecules 2014, 19, 6623-6634.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top