Maprouneacin, a new daphnane diterpenoid with potent antihyperglycemic activity from Maprounea africana.

Bioassay-guided fractionation of the EtOH extract of M. africana, using the in vivo noninsulin-dependent diabetes mellitus db/db mouse model, resulted in the isolation of the new daphnane-type diterpenoid maprouneacin (2). Compound 2 showed potent glucose-lowering properties when given by the oral route.