A new glycoside, γ-pyranone-3-O-β-D-［6′-(4″-hydroxy-3″,5″-dimethyoxybenzoyl)］ glucopyranoside (erigeside D, 2), together with nine known compounds, viz., erigeside Ⅰ (1), erigeside A (3), erigeside B (4), erigeside Ⅱ (5), scopolin (6), icariside B2(7), blumenol C glucoside (8),(+)-syringaresinol- O-β-D-glucopyranoside (9) and scutellarein -7-O-β-D-glucuronide methyl ester (10), was isolated from Erigeron breviscapus (Vant.) Hand.-Mazz. Their structures were established on the basis of spectral evidence.According to the β-glucopyranosyl moiety in 7, the absolute configuration of 7 was determined by X ray crystallographic analysis. Compounds 7, 8 and 9 were isolated for the first time from this genus, and compound 6 was first obtained from this plant.
灯盏花中的糖苷
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