Synonyms: Propanoicacid, 2-methyl-,2,3,3a,4,5,8,9,11a-octahydro-6,10-dimethyl-3-methylene-2,5-dioxocyclodeca[b]furan-4-ylester, [3aS-(3aR*,4S*,6Z,10E,11aR*)]-; Cyclodeca[b]furan, propanoic acidderiv.; 8a-Isobutyryloxy-9-oxo-germacra-4E,1(10)Z-dien-6b,12-olide; Montaleucantholide A