Synonyms: 2-Butenoic acid,2-methyl-,2,3,3a,4,5,8,9,11a-octahydro-9-hydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca[b]furan-4-ylester, [3aR-(3aR*,4S*,6E,9S*,10Z,11aS*)]-; Germacra-1(10),4,11(13)-trien-12-oicacid, 3b,6b,8a-trihydroxy-, 12,6-lactone, 8-(2-methylcrotonate) (8CI); Nobilin (7CI);Cyclodeca[b]furan, 2-butenoic acid deriv.