A new seco-labdane diterpene, maravuic acid, has been isolated by supe
rcritical fluid extraction using CO2 from the bark of Croton matourens
is Aubl. (Euphorbiaceae). Its structure was elucidated by one and two
dimensional NMR methods as 2E)-3,4-seco-labda-4(18),8(20),12,14-tetrae
n-3-oic acid 2.