Abstract: Five xanthone compounds have been isolated from the roots of Jin-Bu-Huan (Veratrilla baillonii Franch. Gentianqceae). On the basis oe spect -rometric analyses (UV. IR. NMR. MS.) and preparation of derivatives, the structure determination of the new compound is established as 1, 3 -dihydroxy -2, 7-dimethoxy xanthone(I), and the other four components were known as: 1- hydroxy- 2, 3, 7- trimethoxy xanthone (Ⅱ), 1- hydroxy -2, 3, 5- trimethoxy xanthone(Ⅲ), 1- hydroxy 2, 3, 4, 5- tetramethoxy xanthone (Ⅳ), 1, 4- dihydroxy- 2, 3, 7- trimethoxy xanthone(Ⅴ).

Key words: xanthones, veratrilla, baillonii, franch, structure