chicks were depleted of vitamin d , divided into groups , and treated daily with ( a ) cholecalciferol , ( b ) 1 alpha-hydroxycholecalciferol [ 1 alpha ( oh ) -d3 ] , ( c ) 24r , 25-dihydroxycholecalciferol [ 24r,25- ( oh ) 2d3 ] , or ( d ) 1 alpha ( oh ) d3 and 24r,25 ( oh ) 2d3 .
C0020337
hydroxycholecalciferol
C0012328
dihydroxycholecalciferol