“…nosyl-5-methylcytosine (1,8,11), and 5-ethyl-, 5-vinyl-, 5-propyl-and 5-allyl-2'-deoxyuridine (3,7,10), have been shown to inhibit the replication of herpes simplex virus (or varicella-zoster virus [9]) at doses which did not adversely affect the growth of the (uninfected) host cells. Whereas 5-iodo-2'-deoxycytidine, 5-bromo-2'-deoxycytidine, 5-ethyl-2'-deoxyuridine, and 1-fl-D-arabinofuranosylthymine were also reported as being active against vaccinia virus (7,8,15,16), other TdR analogs such as 5-iodo-5'-amino-2'-5'-dideoxyuridine (14), 5-methylamino-and 5-methoxymethyl-2'-deoxyuridine (2, 18) proved specifically active against herpes simplex virus.…”