the synthesis of 1,25-dihydroxycholecalciferol [ 1,25 ( oh ) 2d3 ] and 24,25-dihydroxycholecalciferol [ 24,25 ( oh ) 2d3 ] from 25-hydroxycholecalciferol [ 25 ( oh ) d3 ] has previously been shown to occur in cells isolated from bone .
C0006657
25-hydroxycholecalciferol
C2713074
25 ( oh ) d3