Abstract
Tow new arylalkenyl α,β-unsaturated δ-lactones named cryptoconcatones K (1) and L (2) were obtained from the leaves and twigs of Cryptocarya concinna. Their structures were established on the basis of spectroscopic data (MS, 1D and 2D NMR). Compounds 1 and 2 showed cytotoxic activities with IC50 values of 4.5 and 3.9 μM against Huh7 cancer cell line, respectively.
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Acknowledgement
The authors thank Prof. Z.-L. Huang for collecting and identifying the plants.