1,25-Dihydroxy-24-oxo-vitamin D3 1,25-Dihydroxy-24-oxocholecalciferol 24-Kdhvd3 24-Keto-1,25-dihydroxyvitamin D3 76338-50-6 9,10-Secocholesta-5,7,10(19)-trien-24-one, 1,3,25-trihydroxy-, (1alpha,3beta,5Z,7E)-