| Abstract: | Seven xanthonenoid compounds and a triterpenic acid have been isolated from Swertia przewalskii Pissjauk. Their structures were identified as 1,8-dihydroxy-3,7-dimethoxyxarthone(Ⅰ), 1,7-dihydroxy-3,8-dimethoxyxanthone (Ⅱ), oleanolic acid (Ⅲ), l-hydroxy-3,7,8-trimethoxyxanthone (Ⅳ), 1,7,8-trihydroxy-3-methoxyxanthone (Ⅴ), 8-0-β-D-xylopyranosyl-(l--6)-β-D-glucopyranosyl]- 1,7-dihydr0xy- 3-methoxyxanthone (Ⅵ), 1-O- β-D-xylopyranosyl-(1-6)-β-D-glucopyranosyl]-7,8-dihydroxy- 3-methoxyxanthone (Ⅶ) and 1-O- β-D-xylopyranosyl-(1-6)-β-D-glucopyranosyl]-8-hydroxy-3,7-dimethoxyanthone (Ⅷ) respectively, by means of chemical and spectral methods or comparing with the authentic samples directly. |
