Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 2011-May
[Studies on the chemical constituents from Conyza canadensis].
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OBJECTIVE
To study the chemical constituents of Conyza canadensis.
METHODS
Chromatographic methods including HP20 macroporous resin, silica gel, Sephadex LH-20 and eighteen alkyl silane bonding silica gel (ODS) were used for the isolation and purification of Conyza canadensis. The structures of the obtained compounds were identified by physical chemistry and spectroscopic data.
RESULTS
Six compounds were isolated from ethanol-extraction of water area of C. canadensis and identified as Eugenyl beta-Psd (1), scutellarin (2), luteolin-7-O-beta-D-glucuronide (3), quercetin (4), quercetin-3-O-beta-D-glucopyranoside (5) and luteolin (6).
CONCLUSIONS
Compounds 1,3,5 and 6 are isolated from C. canadensis for the first time.
