A new xanthone from Polygala aureocauda Dunn.

AimTo study the chemical constituents of Polygala aureocauda Dunn.. Methods Chemical compounds were isolated by column chromatography and their structures were determined mainly by spectroscopic means (UV, IR, MS, ¹HNMR, ¹³CNMR, HMQC, HMBC). ResultsThree compounds were isolated and identified as 3-hydroxy-1,4-dimethoxyxanthone (I), 1,7-dihydroxy-2,3-methylendioxyxanthone (II), 7-hydroxy-1-methoxy-2,3-methylendioxyxanthone (III). Conclusion Compounds I-III were isolated from Polygala aureocauda Dunn. for the first time, whereas compound I is a new xanthone.