(1S,3R,4S,4aS,7aS)-3-(tert-Butyl-dimethyl-silanyloxymethyl)-1,4-dihydroxy-7-methyl-3,4,4a,7a-tetrahydro-1H-cyclopenta[c]pyran-5-one

(4aS,5S,6R,7aS,7bS)-5-benzoyloxy-5,6,7a,7b-tetrahydro-6-iodomethyl-2H-1,7-dioxacyclopent[cd]inden-4(4aH)-one

(4aS,5S,6R,7aS,7bS)-5-(acetoxy)-6-[((1,1-dimethylethyl)dimethylsiloxy)methyl]-5,6,7a,7b-tetrahydro-2H-1,7-dioxacyclopent[cd]inden-4(4aH)-one

5-(methoxymethyl)-6-[((1,1-dimethylethyl)dimethylsilyloxy)methyl]-5,6,7a,7b-tetrahydro-2H-1,7-dioxacyclopent[cd]inden-4(4aH)-one

(4S,4aR,5S,6R,7aS,7bS)-6-[((1,1-dimethylethyl)dimethylsilyloxy)methyl]-5-(phenylmethoxy)-4,4a,5,6,7a,7b-hexahydro-2H-1,7-dioxacyclopent[cd]indene-4-ol