14-Hydroxy-15-isovaleryloxy-9-oxo-melampolide 3-Methyl-butyric acid 6-hydroxymethyl-3-methylene-2,5-dioxo-2,3,3a,4,5,8,9,11a-octahydro-cyclodeca[b]furan-10-ylmethyl ester InChI=1/C20H26O6/c1-12(2)7-19(23)25-11-14-5-4-6-15(10-21)17(22)9-16-13(3)20(24)26-18(16)8-14/h6,8,12,16,18,21H,3-5,7,9-11H2,1-2H3/b14-8-,15-6-/t16-,18+/m0/s [(3aR,6Z,11aS)-6-(hydroxymethyl)-3-methylene-2,5-dioxo-2,3,3a,4,5,8,9,11a-octahydrocyclodeca[b]furan-10-yl]methyl rel-3-methylbutanoate butanoic acid, 3-methyl-, [(3aS,6Z,11aR)-2,3,3a,4,5,8,9,11a-octahydro-6-(hydroxymethyl)-3-methylene-2,5-dioxocyclodeca[b]furan-10-yl]methyl ester