11,16,18,19-Tetraoxapentacyclo(12.2.2.1(6,9).0(1,15).0(10.12))nonadeca-6,8-dien-17-one, 2,5-bis(acetyloxy)-7,12-dimethyl-4-(2-methyloxiranyl)-, (1R*,2S*,4S*(S*),5R*,10R*,12S*,14R*,15R*)-(-)- 123483-20-5 Bipinnatin C Bipinnatin-C