1,25(OH)2-16-ene-23-yne-D3 118694-43-2 5-{2-[1-((1R)-5-Hydroxy-1,5-dimethylhex-3-ynyl)(7aS)-7a-methyl(3,5,6,7,3a,7a-hexahydroinden-4-ylidene)]ethylidene}(3S,1R)-4-methylenecyclohexane-1,3-diol AIDS-080067 AIDS080067 Vitamin D3 analog