trans-cholecalciferol, trans -vitamin D3,(1S,3E)-3-[(2E)-2-[(1R,3aS,7aR)-7a-methyl-1-[(2R)-6-methylheptan-2-yl]-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4-methylidenecyclohexan-1-ol,"5,6-trans-Vitamin D3 is the major photoisomer of Vitamin D3 analog, as an impurity. ;Impurity in commercial preparations of Vitamin D3",Cholecalciferol
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