Synonyms: Obacunoicacid, e-lactone;Obacunone (6CI,7CI);Oxireno[4,4a]-2-benzopyrano[6,5-g][2]benzoxepin-3,5,9(3aaH,4bH,6H)-trione, 1a-(3-furyl)-1,6aa,7,11a,11ba,12,13,13a-octahydro-4bb,7,7,11ab,13aa-pentamethyl- (8CI);14,15:21,23-Diepoxy-4,4,8-trimethyl-A,D-dihomo-24-nor-4,17-dioxachola-1,20,22-triene-3,7,16-trione;Obacunoic acid 3,4-lactone;Tricoccin S3;[1S-(1a,3aa,4aS*,4bb,6aa,11ab,11ba,13aa)]-1-(3-Furanyl)-1,6a,7,11a,11b,12,13,13a-octahydro-4b,7,7,11a,13a-pentamethyloxireno[4,4a]-2-benzopyrano[6,5-g][2]benzoxepin-3,5,9(3aH,4bH,6H)-trione;