Phytochemical studies on Swertia cordata

Two new xanthones, 1-hydroxy-3,5,7,8-tetramethoxyxanthone [1] and 1,7-dihydroxy-3,5,8-trimethoxyxanthone [2], have been isolated from Swertia cordata and their structures were determined by using 2D-nmr techniques such as HMQC, HMBC, and HOHAHA experiements