(3aR,4R,5S,6aR)-5-Acetyl-4-[1-((1R,3aS,7aS)-4,4,7a-trimethyl-octahydro-inden-1-yl)-vinyl]-tetrahydro-furo[2,3-b]furan-2-one

[(2S,3S,3aR,5R,6aR)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-5-methoxy-hexahydro-furo[2,3-b]furan-3-yl]-((1S,3aS,7aS)-4,4,7a-trimethyl-octahydro-inden-1-yl)-methanone

tert-Butyl-{(2S,3R,3aR,5R,6aR)-5-methoxy-3-[1-((1R,3aS,7aS)-4,4,7a-trimethyl-octahydro-inden-1-yl)-vinyl]-hexahydro-furo[2,3-b]furan-2-ylmethoxy}-diphenyl-silane

2-(tert-butyl-diphenyl-silanyloxymethyl)-5-methoxy-hexahydro-furo[2,3-b]furan-3-carbaldehyde

[2-(tert-butyl-diphenyl-silanyloxymethyl)-5-methoxy-hexahydro-furo[2,3-b]furan-3-yl]-(4,4,7a-trimethyl-3a,4,5,6,7,7a-hexahydro-3H-inden-1-yl)-methanone