Một số flavonoid và dẫn xuất bergenin phân lập từ lá cây cơm nguội đảo Ardisia insularis

Abstract

From the leaves of Ardisia insularis, six flavonoids and four bergenin derivatives have been isolated, myricitrin (1), myricetin 3-O-(3″-O-galloyl)-α-L-rhamnopyranoside (2), desmanthine-2 (3), quercetin 3-O-α-L-rhamnopyranoside (4), 3-O-galloylepicatechin (5), 3-O-galloyl-3'-methoxyepicatechin (6), bergenin (7), norbergenin (8), demethoxybergenin (9) and 4-O-galloylbergenin (10). The structure elucidation of these compounds was peformed by spectroscopic data ESI-MS, 1D-NMR (¹H-NMR, ¹³C-NMR, DEPT) and 2D-NMR (HSQC, HMBC, COSY).