Two New Flavanols from Glycosmis pentaphylla and Their Cytotoxic Activities |
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Authors: | Jiangfeng Wang Bing Zhao Feng Zhang Qiongyu Zhang |
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Affiliation: | 1. Xinxiang Cenctral Hospital, Xinxiang 453000, P.?R. China;2. Department of Anesthesiology, Linyi Maternal and Child Care Service Centre, Linyi 250012, P.?R. China;3. Department of Anesthesiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan 250014, P.?R. China |
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Abstract: | Two new flavanols, (8S,9R)‐9,10‐dihydro‐5,9‐dihydroxy‐8‐(3,4,5‐trimethoxyphenyl)‐2H,8H‐benzo[1,2‐b:3,4‐b′]dipyran‐2‐one ( 1 ) and (2S,3R)‐3,4‐dihydro‐3,5‐dihydroxy‐2‐(3,4,5‐trimethoxyphenyl)‐2H,8H‐benzo[1,2‐b:3,4‐b′]dipyran‐8‐one ( 2 ), were isolated from the stems of Glycosmis pentaphylla. The structures of these compounds were determined by extensive spectroscopic (UV, IR, HR‐ESI‐MS, 1D‐ and 2D‐NMR) analyses. The cytotoxic activities of these compounds were evaluated using the MTT method. The results showed that compounds 1 and 2 exhibited considerable cytotoxic activities against HL‐60 and A549 cell lines. |
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Keywords: | Glycosmis pentaphylla Flavanols Cytotoxic activity |
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