Acetic acid 1-methyl-1-[(3aS,5aS,8R,9aR)-5a-methyl-2-oxo-3a-(toluene-4-sulfonyloxymethyl)-octahydro-benzo[c]furo[3,2-b]furan-8-yl]-ethyl ester

(4R,5S,5aS,8R,9aR)-2,4,5,5a,6,7,8,9-octahydro-4,5-dihydroxy-5a-methyl-8-(1-methyl-1-acetoxyethyl)-1H-indeno<7a,1-b>-2,5-dihydrofuran-2-one

(3aR,4S,5S,5aS,8R,9aR)-perhydro-3a-acetoxy-4,5-dihydroxy-5a-methyl-8-(1-methyl-1-acetoxyethyl)indeno<7a,1-b>tetrahydrofuran-2-one

(5aS,8R,9aR)-2,5a,6,7,8,9-hexahydro-5a-methyl-8-(1-methyl-1-acetoxyethyl)-1H-indeno<7a,1-b>-2,5-dihydrofuran-2-one

Acetic acid 1-((5aS,8R,9aR)-3,3a-dihydroxy-5a-methyl-2-oxo-2,3,3a,5a,6,7,8,9-octahydro-indeno[7a,1-b]furan-8-yl)-1-methyl-ethyl ester