Synonyms: 2-Butenoicacid, 2-(hydroxymethyl)-,(2E)-2-[[[(3aR,4R,6aR,7R,9aR,9bR)-2,3,3a,4,5,6,6a,7,9a,9b-decahydro-7-hydroxy-9-methyl-3,6-bis(methylene)-2-oxoazuleno[4,5-b]furan-4-yl]oxy]carbonyl]-2-butenylester, (2E)- (9CI); 2-Butenoic acid, 2-(hydroxymethyl)-,2-[[[2,3,3a,4,5,6,6a,7,9a,9b-decahydro-7-hydroxy-9-methyl-3,6-bis(methylene)-2-oxoazuleno[4,5-b]furan-4-yl]oxy]carbonyl]-2-butenylester, [3aR-[3aa,4b[E(E)],6aa,7b,9aa,9bb]]-; Azuleno[4,5-b]furan,2-butenoic acid deriv.; Prespicatin