(4S,?6R)?-1-?[(E)?-?[(1R,?3aS,?4E,?7aR)?-?1-?[(1R)?-?1,?5-?Dimethylhexyl]?octahydro-?7a-?methyl-?4H-?inden-?4-?ylidene]?methyl]?-?1,?3,?4,?5,?6,?7-?hexahydro-benzo[c]?thiophene-?4,?6-?diol 2,?2-?Dioxide is an intermediate in synthesizing 5,6-trans-Alfacalcidol (T714600), an impurity of Alfacalcidol (A524000), a synthetic analog of Calcitiol (the hormonal form of vitamin D3), which shows identical potency with respect to stimulation of intestinal calcium absorption and bone mineral mobilization. Vitamin D source.
