Synonyms: Obacunoicacid, 7-deoxo-7-hydroxy-, e-lactone, (7a)-;Obacunol (7CI); Oxireno[4,4a]-2-benzopyrano[6,5-g][2]benzoxepin-3,9(3aaH,4bH)-dione, 1a-(3-furyl)-1,5,6,6aa,7,11a,11ba,12,13,13a-decahydro-5a-hydroxy-4bb,7,7,11ab,13aa-pentamethyl- (8CI);Oxireno[4,4a]-2-benzopyrano[6,5-g][2]benzoxepin, obacunoic acid deriv.; 7a-Obacunol;Oxireno[4,4a]-2-benzopyrano[6,5-g][2]benzoxepin-3,9(3aH,4bH)-dione,1-(3-furanyl)-1,5,6,6a,7,11a,11b,12,13,13a-decahydro-5-hydroxy-4b,7,7,11a,13a-pentamethyl-,[1S-(1a,3aa,4aS*,4bb,5a,6aa,11ab,11ba,13aa)]-