(1R,3aR,7aR)-1-[(1R)-1,5-Dimethyl-5-[(trimethylsilyl)oxy]hexyl]octahydro-7a-methyl-4H-inden-4-one is an intermediate in synthesizing (1α,3β,9β)-Cholesta-5,7-diene-1,3,25-triol (C431410), which is a natural secondary steroid used to determine the signal transduction pathways for rapid and genomic responses to calcitriol discrimination between different agonist shapes.