Martha calciferol CD ring;(1S,3aR,7aR)-1-[(S)-1-(3-Methyl-3-trimethylsilyloxybutyloxy)ethyl]-7a-methyloctahydro-1H-inden-4-one;(1S,3aR,7aR)-7a-methyl-1-((S)-1-(3-methyl-3-((trimethylsilyl)oxy)butoxy)ethyl)octahydro-4H-inden-4-one;(1S,3aR,7aR)-7a-Methyl-1-[(1S)-1-{3-methyl-3-[(trimethylsilyl)oxy]butoxy}ethyl]octahydro-4H-inden-4-one;(1S,3aR,7aR)-Octahydro-7a-Methyl-1-((1S)-1-(3-Methyl-3-((triMethylsilyl)oxy)butoxy)ethyl)-4H-Inden-4-one;(1S,3aR,7aR)-7a-methyl-1-((S)-1-(3-methyl-3-((trimethylsilyl)oxy)butoxy)ethyl)hexahydro-1H-inden-4(2H)-one;4H-Inden-4-one,octahydro-7a-methyl-1-[(1S)-1-[3-methyl-3-[(trimethylsilyl)oxy]butoxy]ethyl]-, (1S,3aR,7aR)-
