tert-butyldimethyl(((1S,E)-3-((E)-2-((1S,3aS,7aR)-7a-methyl-1-(6-methylheptan-2-yl)hexahydro-1H-inden-4(2H)-ylidene)ethylidene)-4-methylenecyclohexyl)oxy)silane CAS NO.87649-55-6

Alfacalcidol is an analogue of calcitriol that only needs to be hydroxylated in the liver to become active 1, 25- (0H) 2D3.This product can increase the small intestine and renal tubules to calcium reabsorption, inhibit parathyroid hyperplasia, reduce parathyroid hormone synthesis and release, inhibit bone absorption;Increased the synthesis of transforming growth factor-b (TGF -- B) and insulin-like growth factor-i (1GF -- I), and promoted the synthesis of collagen and bone matrix proteins.Regulate muscle calcium metabolism, promote muscle cell differentiation, enhance muscle strength, increase neuromuscular coordination, and reduce falling tendency.