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Three new xanthones from the roots of Polygala japonica Houtt
Jing Fu1, Dong-Ming Zhang, Ruo-Yun Chen
1Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Ministry of Education, Beijing 100050, People's Republic of China.
Abstract:
Three new xanthones, 3, 6-dihydroxy-1, 2, 7-trimethoxyxanthone (2), 3, 7-dihydroxy- 1, 2-dimethoxyxanthone (4) and 1, 2, 7-trihydroxy-3-methoxyxanthone (9), together with seven known compounds were isolated from the roots of Polygala japonica Houtt. Their structures were determined on the basis of spectroscopic data.
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