Separation and identification of flavonoids from fistular onion stalk (Allium fisturosum L. var. Caespitosum Makio) / 华中科技大学学报（医学）（英德文版）

ABSTRACT

The chemical constituents of fistular onion stalk obtained by supercritical CO(2) extraction were separated and purified by silica gel and sephadex LH-20 gel column chromatography and the preparative TLC method and four flavonoids were obtained. On the basis of the spectral data, they were structurally identified as (+)-catechin, (-)-epicatechin, astragalin, and 3-O-beta-D(2-O-beta-D-glucopyranosyl)-glucopyranosides of kaempferol.