Synonyms: 2-Butenoicacid, 2-methyl-,(3aR,4R,6R,7S,9S,10Z,11aR)-2,3,3a,4,5,6,7,8,9,11a-decahydro-7,9-dihydroxy-6,10-dimethyl-3-methylene-2-oxo-6,9-epoxycyclodeca[b]furan-4-ylester, (2Z)- (9CI); 2-Butenoic acid, 2-methyl-, 2,3,3a,4,5,6,7,8,9,11a-decahydro-7,9-dihydroxy-6,10-dimethyl-3-methylene-2-oxo-6,9-epoxycyclodeca[b]furan-4-ylester, [3aR-[3aR*,4R*(Z),6R*,7S*,9R*,10Z,11aR*]]-; 6,9-Epoxycyclodeca[b]furan,2-butenoic acid deriv.; Niveusin C