STUDIES ON THE CHEMICAL CONSTITUENTES OF BOSCHNIAKIA ROSSICA FEDTSCH. ET FLEROV

AIM： To investigate the chemical constituents of Boschniakia rossica (Cham. et Schltdl) Fedtsch. et Flerov. METHODS: The alcohol extracts of the whole plants of B.rossica was extracted with petroleum ether and EtOAc, respectively. Eight compounds were isolated from the EtOAc part by using repeated silica gel column chromatography and preparative TLC, and their structures were determined by chemical conversion and spectral methods. RESULTS: The eight compounds were identified as 4,5,6-trihydroxy-aurone (1), β-sitosterol (2), β-sitosterol 3-O-β-D-glucopyranoside (3), 7-deoxy-8-epiloganic acid (4), gallic acid (5), cinnamic acid (6), caffeic acid (7) and baschnaloside (8), respectively. CONCLUSION: 4,5,6-Trihydroxy-aurone (1) was a new compound, compounds (4), (5), (6) and (7) were isolated from this plant for the first time.