to determine the relative importance of different metabolites of vitamin d in bone growth and development , weanling male rat pups suckled by vitamin d-deficient mothers were given either calcitriol ( 1,25-dihydroxycholecalciferol ) by continuous subcutaneous infusion , oral calcidiol ( 25-hydroxycholecalciferol ) , or oral 24,24-difluoro-25-hydroxycholecalciferol , a synthetic compound that can undergo 1-hydroxylation but not 24-hydroxylation , as their sole source of vitamin d for 40 d .
C0006674
calcitriol
C0012328
dihydroxycholecalciferol