(6R)-6-((1R,3aS,7aR,E)-4-((Z)-2-((3S,5R)-3,5-dihydroxy-2-methylenecyclohexylidene)ethylidene)-7a-methyloctahydro-1H-inden-1-yl)-2,4-dihydroxy-2-methylheptan-3-one; 1,23,25-Trihydroxy-24-oxocholecalciferol; 24-Oxo-23-hydroxycalcitriol,vitamin D3 Impurity