Objective To study the chemical constituents of Hedyotis diffusa Willd.Methods The compounds were isolated by chromatography on silica gel column and identified on the basis of physico-chemical constants and spectral analysis.Results Seven compounds were isolated and their structures were identified as β-sitosterol(1),daucosterol(2),ursolic acid(3),2-hydroxy-3-methyl-1-methoxyanthraquinone(4),2-hydroxy-7-methyl-3-methoxyanthraquinone(5),E-6-O-p-methoxycinnamoyl scandoside methyl ester(6),E-6-O-p-coumaroyl s...