(3aR,4S,5aR,6R,9S,9aS)-9-formyl-6-hydroxy-5a-methyl-3-methylene-2-oxododecahydronaphtho[1,2-b]furan-4-yl rel-4-(acetyloxy)-3-hydroxy-2-methylenebutanoate 4-Acetoxy-3-hydroxy-2-methylene-butyric acid 9-formyl-6-hydroxy-5a-methyl-3-methylene-2-oxo-dodecahydro-naphtho[1,2-b]furan-4-yl ester 8alpha-(3'-Hydroxy-4'-acetoxy-2'-methylene-butanoyloxy)-4-epi-sonchucarpolide InChI=1/C22H28O9/c1-10(14(25)9-29-12(3)24)20(27)30-15-7-22(4)16(26)6-5-13(8-23)18(22)19-17(15)11(2)21(28)31-19/h8,13-19,25-26H,1-2,5-7,9H2,3-4H3/t13-,14?,15+,16-,17-,18-,19?,22+/m1/s butanoic acid, 4-(acetyloxy)-3-hydroxy-2-methylene-, (3aR,4S,5aR,6R,9S,9aS)-9-formyldodecahydro-6-hydroxy-5a-methyl-3-methylene-2-oxonaphtho[1,2-b]furan-4-yl ester