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Flavonol glycosides and dammarane saponin from Gouania leptostachya
Author(s) -
Thuy Nguyen Thi Kim,
Trang Do Thi,
Trang Mai Thi Nhu,
Bay Ninh Khac,
Tai Bui Huu,
Van Kiem Phan,
Yen Pham Hai,
Nhiem Nguyen Xuan
Publication year - 2019
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201960026
Subject(s) - dammarane , saponin , glycoside , quercetin , chemistry , stereochemistry , traditional medicine , organic chemistry , medicine , triterpene , alternative medicine , pathology , antioxidant
Using combined chromatographic methods, two flavonol glycosides and one dammarane‐ type saponin were isolated from the methanol extract of the leaves of Gouania leptostachya . Their structures were elucidated to be quercetin 3‐ O‐β ‐D‐xylopyranosyl‐(1 → 2)‐α‐L‐rhamnopyranoside ( 1 ), quercetin 3‐ O‐ 6‐ E ‐ p ‐coumaroyl‐ β ‐D‐glucopyranosyl‐(1 → 2)‐ α ‐L‐rhamnopyranoside ( 2 ) and joazeiroside A ( 3 ) by 1D‐, 2D‐NMR, and MS spectra and in comparison with those reported in the literature. These compounds have been reported from the Gouania genus for the first time.