Synonyms: 2-Butenoicacid, 2-methyl-,1a,2,3,5a,7,8,8a,9,10,10a-decahydro-3-hydroxy-4,10a-dimethyl-8-methylene-7-oxooxireno[5,6]cyclodeca[1,2-b]furan-9-ylester, [1aR-[1aR*,3S*,4Z,5aR*,8aR*,9R*(Z),10aR*]]-;Oxireno[5,6]cyclodeca[1,2-b]furan, 2-butenoic acid deriv.; (Z,Z)-Heliangin;Leptocarpin