Xanthones from Swertia nervosa wall

Phytochemical investigations of the whole plant Swertia nervosa yielded three tetraoxygenated xanthones namely 1,8-dihydroxy-3, 7-dimethoxyxanthone, swertiaperennine (1), 1-hydroxy-3, 7, 8-trimethoxyxanthone, decussatin (2) and 1,7-dihydroxy-3,8-dimethoxy-xanthone gentiacaulein (3). The spectral details of these compounds have been presented.