Synonyms: (-)-Ferolide;3-Methyl-2-butenoic acid 3-(acetyloxy)-2,3,3a,4,5,7,9a,9b-octahydro-3,6,9-trimethyl-2,7-dioxoazuleno[4,5-b]furan-4-yl ester;Ferolide;3-Methyl-2-butenoic acid (3aR)-3-acetyloxy-2,3,3aβ,4,5,7,9aβ,9bα-octahydro-3,6,9-trimethyl-2,7-dioxoazuleno[4,5-b]furan-4β-yl ester