Xanthones from Stems of Hypericum chinense

Naonobu Tanaka, Yoshihisa Takaishi
2007 Chemical and pharmaceutical bulletin  
Six new xanthones, 4,6-dihydroxy-2,3-dimethoxyxanthone (1), 2,6-dihydroxy-3,4-dimethoxyxanthone (2), 6hydroxy-2,3,4-trimethoxyxanthone (3), 3,6-dihydroxy-1,2-dimethoxyxanthone (4), 4,7-dihydroxy-2,3-dimethoxyxanthone (5), and 3,7-dihydroxy-2,4-dimethoxyxanthone (6) were isolated from the stems of Hypericum chinense, together with four known xanthones. Their structures were established based on spectroscopic studies.
doi:10.1248/cpb.55.19 pmid:17202694 fatcat:7vamswtifrgsljnbv3zeihjome