Three new compounds, actinidione ( 1), 3 beta,29-dihydroxylup-20(30)-en-28-al ( 2) and 3 beta- O- trans-caffeoyl-29-hydroxybetulin ( 3), along with twenty known compounds ( 4 - 23), were isolated from the leaves and twigs of Clematoclethra actinidioides Maxim. Their structures were determined by analysis of spectral data or comparison with authentic samples. Compounds 1, 2 and 3 exhibited cytotoxicity against Lu-06, N-04 and Bre-04 cell lines with GI (50) values of 15.02 - 41.64 microg/mL.
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Guo et al. (2006) studied this question.