摘要

A novel compound, 4-{1'-hydroxy-1'-mercapto-1'-[1''-2''(N -> O)-isoquinolyl]}yl-1-benzoic acid (1), together with six known compounds, 6-hydroxykaempferol-3-O-beta-D-glucopyranoside (2), rutin (3), quercetin-3-O-beta-D-glucopyranoside (4), kaempferol-3-O-beta-D-glucopyranoside (5), cartormin (6), hydroxysafflor yellow A (7), were isolated by chromatography from the n-BuOH fraction of 50% ethanol extraction of Flos carthami. Their structures were elucidated on the basis of spectral analysis and comparison with published data. Among them, compound 1 was shown to possess a weak protective effect against cerebral ischemic damage in rats.