the active transport of deoxyuridine into choroid plexus , which is inhibited by naturally occurring ribo- and deoxyribonucleosides ( ic50 = 7-21 microm ) , was not inhibited ( ic50 much greater than 150 microm ) by nucleosides with certain alterations on the 2 ' , 3 ' , or 5 ' positions in d-ribose or 2-deoxy-d-ribose ( e.g. , adenine arabinoside , 3'-deoxyadenosine , xylosyladenosine ) ;
C0011528
deoxyribonucleosides
C0028621
nucleosides