Chemical Constituents of Tripterospermum chinense

Objective To investigate the chemical constituents of 60% EtOH extract of Tripterospermum chinense.Methods The compounds were isolated by column chromatography over silica gel,Sephadex LH-20,RP-C18 silica gel,and recrystallization.Structures of the compounds were elucidated physicochemical properties and spectral data.Results Thirteen compounds were isolated and identified as isovitexin(1),7-O-rhamnopyransoyl-isovitexin(2),7-O-rhamnopyransoyl-isoorientin(3),saponarin(4),2″-O-rhamnopyransoyl-trifoliside(5),trifoliside(6),8-hydroxy-1,2,6-trimethoxyxanthone(7),1,7-dihydroxy-3,8-dimethoxyxanthone(8),1,2,8-trihydroxy-5,6-dimethoxyxanthone(9),oleanolic acid(10),ursolic acid(11),daucosterol(12),and caffeic acid(13).Conclusion Compounds 2-6 were isolated from Tripterospermum for the first time.Compounds 1,and 10-12 were isolated from this plant for the first time.The NMR data of compounds 2 and 3 were reported for the first time.