cytellin and gentiopicroside

To investigate the chemical constituent from the roots of Gentiana straminea.. The constituents were separated by microporous resin,silica gel,Sephadex LH-20 and preparative column chromatography and their structures were elucidated by NMR and MS spectral methods.. Twelve chemical constituents were isolated from the roots of Gentiana straminea and their structures were identified as daucosterol( 1),β-sitosterol( 2),ursolic acid( 3),sweroside( 4),swertiamarin( 5),gentiopicroside( 6),6’-O-acetyl-gentiopicroside( 7),6’-O-β-D-glucopyranosyl-sweroside( 8),protocatech uic aldehyde( 9),protocatechuic acid( 10),methyl gallate( 11) and dibutyl phthalate( 12).. The compounds 8,9,10,11 and 12 are obtained from this plant for the first time.

Topics: Gentiana; Iridoid Glucosides; Magnetic Resonance Spectroscopy; Medicine, Tibetan Traditional; Plant Roots; Pyrones; Sitosterols; Triterpenes; Ursolic Acid

To isolate and identify the chemical constituents of 95% alcohol extract from Swertia delavayi.. The compounds were isolated and purified by column chromatogrphy and their structures were identified by the physicochemical properties and spectral analyses.. Seven compounds were isolated and identified as oleanolic acid (1), gentiopcroside (2), swertiamarin (3), daucosterol (4), swertiadecoraxanthone-II (5), isovitexin (6), isoorientin (7).. Compounds 2-7 were isolated from S. delavayi for the first time. While the compound 6 was firstly reported from the genus Swertia.

Topics: Apigenin; Glucosides; Iridoid Glucosides; Iridoids; Luteolin; Magnetic Resonance Spectroscopy; Oleanolic Acid; Pyrones; Sitosterols; Spectrometry, Mass, Electrospray Ionization; Swertia