(1R,3aR,7aR)-1-[(1R)-1,5-Dimethyl-5-[(trimethylsilyl)oxy]hexyl]octahydro-7a-methyl-4H-inden-4-one-d6 is an intermediate used in the synthesis of Calcitriol-d6 (C144502), which is the biologically active form of vitamin D3. Calcium regulator; vitamin (antirachitic); antihyperparathyroid; antineoplastic; antipsoriatic.