Xanthones and flavonoids from Gentiana algida Pall

This article is devoted to phytochemical investigation of xanthones and flavonoids from the Gentiana algida Pall. (cold gentian, the Gentianaceae family). The following xanthones and flavones have been isolated from the top of the gentian: bellidifolin, isobellidifolin, swerchirin, 1,5,8-tirhydroxy-3,4-dimethoxyxanthone, swertisin, and swertianolin (flavone-C-glycoside). The isolated compounds have been identified on the basis of their chemical conversions and by their UV, mass, 1H, and 13C NMR spectra. Derivatives of 1,3,5,8-tetrahydroxyxanthone were mainly found in the top of the cold gentian.

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