From the whole plant of Frasera tetrapetala PALL. (Gentianaceae), 1, 3-dihydroxy-2, 4, 7-trimethoxyxanthone (I) was isolated as a new compound together with 1-hydroxy-2, 3, 4, 5-tetramethoxyxanthone, oleanolic acid, apigenin, swertisin and methyl 2-hydroxy-3-(1-β-D-glucopyranosyl) oxybenzoate. This result support the Toyokuni's proposal in which this plant could be classified into Frasera rather than Swertia with taxomic evidence.
