Synonyms: 2-Butenoicacid, 4-(acetyloxy)-2-methyl-,2,3,3a,4,5,6,6a,9,9a,9b-decahydro-6a,9-dihydroxy-9-methyl-3,6-bis(methylene)-2-oxoazuleno[4,5-b]furan-4-ylester, [3aR-[3aa,4b(Z),6aa,9b,9aa,9bb]]-; Azuleno[4,5-b]furan, 2-butenoic acid deriv.;Jamaicolide A