<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A group of phytochemicals isolated from several species of the plant family Simaroubaceae with potential antineoplastic activity. Quassinoid agents also exhibit antimalarial, antiprotozoal and antiproliferative activities. (NCI04)</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>