among these compounds , the 3'-azido analogues of thymidine , 2'-deoxy-5-bromouridine , and 2'-deoxy-5-iodouridine , the 2',3'-unsaturated analogue of thymidine and and 2'-deoxycytidine , and 2',3'-dideoxycytidine were found to be most active , with ed50 values of 0.02 , 1.5 , 3.0 , 2.5 , 3.7 , and 4.0 microm , respectively .
C0011485
deoxycytidine
C0012132
dideoxycytidine