Compounds of formula I: ##STR1## wherein Y, X, R1 and Ra are defined herein are in methods for treating or preventing a viral infections selected from herpes simplex virus, varicella zoster virus, respiratory syncytial virus and cytomegalovirus infections.
RELATED APPLICATIONS
This application claims priority from U.S. applications Ser. No. 60/155,704 filed on Aug. 24, 1999 and Ser. No. 60/155,705 filed on Aug. 24, 1999 which are herein incorporated by reference.
