Calcitriol EP Impurity C

Chemical Name: Triazoline adduct of pre- calcitriol ; (4aR,6aR,7R,9aR,11S)-11-((3S,5R)-3,5-dihydroxy-2-methylcyclohex-1-en-1-yl)-7-((R)-6-hydroxy-6-methylheptan-2-yl)-6a-methyl-2-phenyl-4a,6,6a,7,8,9,9a,11-octahydro-1H,5H-cyclopenta[f][1,2,4]triazolo[1,2-a]cinnoline-1,3(2H)-dione