Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, China.
Magn Reson Chem. 2012 Sep;50(9):642-5. doi: 10.1002/mrc.3852. Epub 2012 Aug 1.
Four new xanthones, 1-methoxy-3,7,8-trihydroxyxanthone (1), 1-methoxy-4,7,8-trihydroxyxanthone (2), 1-methoxy-4,7-dihydroxyxanthone (3), and 1,4-dimethoxy-2,7-dihydroxyxanthone (4) were isolated from the stems of Cratoxylum cochinchinense along with four known xanthones (5-8). The structures of new compounds were determined by extensive spectroscopic analyses, mainly 1D and 2D NMR and HRESIMS data.
从越南钩藤茎中分离得到了四个新的黄烷酮类化合物，分别为 1-甲氧基-3,7,8-三羟基黄烷酮（1）、1-甲氧基-4,7,8-三羟基黄烷酮（2）、1-甲氧基-4,7-二羟基黄烷酮（3）和 1,4-二甲氧基-2,7-二羟基黄烷酮（4），同时还分离得到了四个已知的黄烷酮类化合物（5-8）。通过广泛的光谱分析，主要是 1D 和 2D NMR 以及 HRESIMS 数据，确定了新化合物的结构。
