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A new oxyneolignan, claulignan (1), together with seven known compounds (2-8), were isolated from the methanol extract of the roots and stems of Clausena lansium. Their structures were elucidated on the basis of 1D and 2D NMR experiments and mass spectrometry. Compounds 2-8 were isolated from the genus Clausena for the first time. Compounds 1 and 6 showed cytotoxicity against human cervical cancer HeLa cell line with the IC50values of 2503 and 5399μM, respectively. Compound 3 exhibited antioxidant activity in the DPPH assay with the EC50 value of 26896g·kg-1. 相似文献
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