Eight new 4-phenylfuranocoumarins (1-8) have been isolated from the stem ba
rk and the fruits of Calophyllum dispar, together with three known coumarin
s. The structures of 1-8 were established by means of spectroscopic analysi
s, including extensive 2D NMR studies. Some of these furanocoumarins exhibi
ted significant cytotoxic activity against KB cells.