1-α-Hydroxycholecalciferol; 1-α-Hydroxyvitamin D3;1-Hydroxyvitamin D3; (1S,3R,5Z,7E)-9,10-Secocholesta-5,7,10(19)-triene-1,3-diol; (1R,3S,Z)-5-(2-((1R,3aS,7aR,E)-7a-methyl-1-((R)-6-methylheptan-2-yl)octahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diol.