Xanthones from the stems of Cratoxylum cochinchinense |
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| Authors: | Yinghui Duan Yi Dai Liuyuan Chen Mingli Liu Yaolan Li Xinsheng Yao |
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| Institution: | 1. Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, , Guangzhou, 510632 China;2. Integrated Traditional Chinese and Western Medicine Postdoctoral Station, School of Medicine, Jinan University, , Guangzhou, 510632 China;3. Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, , Guangzhou, 510632 China;4. State key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, , Shanghai, 201203 China;5. School of Traditional Materia Medica, Shenyang Pharmaceutical University, , Shenyang, 110016 China |
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| Abstract: | 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. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1H NMR 13C NMR xanthones Cratoxylum cochinchinese structure assignment |
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