5-Acetoxy-4-(4-hydroxy-2-methyl-but-2-enoyloxy)-10-methyl-3-methylene-2-oxo-2,3,3a,4,5,8,9,11a-octahydro-cyclodeca[b]furan-6-carboxylic acid methyl ester InChI=1/C23H28O9/c1-12-7-6-8-16(23(28)29-5)19(30-15(4)25)20(32-21(26)13(2)9-10-24)18-14(3)22(27)31-17(18)11-12/h8-9,11,17-20,24H,3,6-7,10H2,1-2,4-5H3/b12-11+,13-9+,16-8+/t17-,18+,19+,20+/m1/s cyclodeca[b]furan-6-carboxylic acid, 5-(acetyloxy)-2,3,3a,4,5,8,9,11a-octahydro-4-[[(2E)-4-hydroxy-2-methyl-1-oxo-2-butenyl]oxy]-10-methyl-3-methylene-2-oxo-, methyl ester, (3aS,4S,5S,6E,10E,11aR)- methyl rel-(3aR,4R,5R,6E,10E,11aS)-5-(acetyloxy)-4-{[(2E)-4-hydroxy-2-methylbut-2-enoyl]oxy}-10-methyl-3-methylene-2-oxo-2,3,3a,4,5,8,9,11a-octahydrocyclodeca[b]furan-6-carboxylate