Mallotojaponin B  Mallotojaponin B is a dimeric phlorogucinol found in "Mallotus oppositifolius". The bioassay-guided fractionation of an ethanol extract of the leaves and inflorescence of "M. oppositifolius" collected in Madagascar led to the isolation of the two new bioactive dimeric phloroglucinols mallotojaponins B and C, together with mallotophenone. These compounds show antiproliferative and antiplasmodial activities.