Synonyms: 2-Butenoicacid, 2-methyl-,2,3,3a,4,5,6,7,10,11,11a-decahydro-11-hydroxy-6-methyl-3,10-bis(methylene)-2,7-dioxo-6,9-epoxycyclodeca[b]furan-4-ylester, [3aR-[3aR*,4S*(Z),6R*,11R*,11aS*]]-; 6,9-Epoxycyclodeca[b]furan,2-butenoic acid deriv.; Isocentratherin