Four new 4-phenylcoumarins, disparinols A and B, isodisparinols A and B, ha
ving a 2-hydroxy-3-methylbut-3-enyl substituent were isolated from the bark
of <(Calophyllum)under bar><(dispar)under bar> (Clusiaceae). Their structu
res were established by means of spectroscopic studies and confirmed by hem
isynthesis.