Synonyms: 17,19-Dinor-8bH-labda-3,13-dien-15-oic acid, 6b,16-dihydroxy-5,9-dimethyl-, g-lactone, 2-methylcrotonate, (Z)-(8CI); 2-Butenoic acid, 2-methyl-,4-[2-(2,5-dihydro-5-oxo-3-furanyl)ethyl]-1,2,3,4,4a,5,6,8a-octahydro-3,4,8,8a-tetramethyl-1-naphthalenylester, [1R-[1a(Z),3b,4b,4ab,8ab]]-; Crotonic acid, 2-methyl-,ester with 6b,16-dihydroxy-5,9-dimethyl-17,19-dinor-8bH-labda-3,13-dien-15-oic acid g-lactone, (Z)- (8CI);Elongatolide C; Solidagolactone II