the selectivity indexes ( ratio of id50 for host-cell dna synthesis to id50 for vzv replication ) of bvarau , ivdu , and bvdu were between 41,000 and 67,000 , whereas those of cytosine arabinoside , idu , and 5-bromo-2'-deoxyuridine were less than 1.1 .
C0011535
idu
C0006233
5-bromo-2