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A new stilbene, 4-(2"E)-7"-hydroxy-3",7"-dimethyloct-2"-enyl-2',3,4',5-tetrahydroxy-trans-stilbene (1), and the known compound chlorophorin (2) were isolated from the heartwood of Chlorophora excelsa. Both 1 and 2 showed tyrosinase inhibitory activity with IC(50) values of 96 and 1.3 microM, respectively.
Shimizu et al. (2003) studied this question.