A bioactivity guided fractionation, using KB cells and brine shrimp as
says, of the methanolic extract from the leaves of Picramnia antidesma
yielded two known anthraquinones, aloe-emodin and aloe-emodin anthron
e, and three new aloe-emodin C-glycosides, named picramnioside A, picr
amnioside B and picramnioside C. Structures were established by spectr
oscopic methods (UV, IR, mass spectrometry,H-1 and C-13 and 2D NMR inc
luding COSY 45,HMQC, HMBC and ROESY). CD was used to establish the abs
olute configuration of the picramniosides.