10-Oxo-19-nor-25-hydroxyvitamin D3 19-NK-25 Hvd3 19-Nor-10-keto-25-hydroxyvitamin D3 19-Nor-10-oxo-25-hydroxyvitamin D3 19-Nor-9,10-secocholesta-5,7-dien-4-one, 1,25-dihydroxy-, (1alpha,5E,7E)- 5(E)-19-Nor-10-keto-25-hydroxycholecalciferol 85925-90-2