大叶藤黄中三个新酮类成分(英文)

Three new xanthones from Garcinia xanthochymus

为了研究大叶藤黄树皮中酮类成分,运用正相和反相硅胶柱色谱法对大叶藤黄树皮乙酸乙酯萃取物进行分离纯化,并用波谱技术鉴定化合物结构。共分离得到3个新酮类化合物,其结构分别鉴定为1,2,5-三羟基-6-甲氧基酮(1),1,4,6-三羟基-5-甲氧基酮(2),1,2,7-三羟基-4-(1,1-二甲基烯丙基)酮(3)。

To study xanthones from the barks of Garcinia xanthochymus, the constituents were isolated by normal-phase and reverse-phase silica gel column chromatography from the EtOAc extract. Their structures were elucidated by spectral analysis. Three new xanthones were purified and identified as 1,2,5- trihydroxy-6-methoxyxanthone （ 1 ）, 1,4,6-trihydroxy-5-methoxyxanthone （ 2 ）, 1,2,7-trihydroxy-4 - （ 1,1 - dimethylallyl） xanthone （3）.