(1R,7AR)-1-((R)-6-Hydroxy-6-methylheptan-2-yl)-7VIP(LA)methylhexahydro-1H-inden-4(2H)-one-d6 is an intermediate used in the synthesis of Calcitriol-d6 (C144502), which is the biologically active form of vitamin D3. Calcitriol-d6 is a calcium regulator; vitamin (antirachitic); antihyperparathyroid; antineoplastic; antipsoriatic.