De-A,B-24-oxo-23,25-(isopropylidenedioxy)cholestan-8-ol

De-A,B-24-oxo-23,25-dihydroxy-cholestan-8-benzyloxymethyl ether

[(1R,3aR,4S,7aR)-1-((E)-(1R,4S)-4-Ethyl-1,5-dimethyl-hex-2-enyl)-7a-methyl-octahydro-inden-4-yloxy]-trimethyl-silane

1-[(tert-butyldimethylsilyl)oxy]-23,25-(isopropylidenedioxy)-24-oxo-19-nor-vitamin D3 tert-butyldimethylsilyl ether

De-A,B-22-benzenesulphonyl-24,25-diol-cholestan-8-benzyloxymethyl ether