the present studies measure the transport of retinol , retinoic acid , 1,25-dihydroxyvitamin d3 [ 1,25- ( oh ) 2d3 ] , and 25-hydroxyvitamin d3 [ 25- ( oh ) d3 ] through the rat brain capillary endothelial wall , i.e. , the blood-brain barrier ( bbb ) .
C0006657
25-hydroxyvitamin d3
C2713074
25