Zhongguo Zhongyao Zazhi 2004-Oct
[Studies on the flavonoids in herb from Scutellaria barbata].
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OBJECTIVE
To study flavonoids in Scutellaria barbata and elucidate their structures.
METHODS
Compounds were isolated and purified by normal column chromatography, paper thin layer chromatography and Sephadex chromatography. The chemical structures were elucidated by ESI mass and NMR spectra.
RESULTS
Five flavonoids were isolated from S. barbata and identified as apigenin (1), luteolin (2), ethyl-7-O-apigenin-glucuronate (3), apigenin-7-O-beta-glucoside (4), and apigenin-7-O-neohesperidoside (5), in addition to benzyaldehyde (6).
CONCLUSIONS
Flavonoidglycoside (3), (4) and (5) were isolated from S. barbata for the first time.
