Synonyms: 2-Butenoicacid, 2-methyl-, 4,4a,5,6,7,9-hexahydro-3,4a,5-trimethyl-9-oxonaphtho[2,3-b]furan-4-ylester, [4S-[4a(Z),4aa,5a]]-; Eremophila-1(10),7,11-trien-9-one, 8,12-epoxy-6b-hydroxy-, 2-methylcrotonate,(Z)- (8CI); Crotonic acid, 2-methyl-, ester with 8,12-epoxy-6b-hydroxyeremophila-1(10),7,11-trien-9-one,(Z)- (8CI); Naphtho[2,3-b]furan, 2-butenoic acid deriv.; Neoadenostylone