| abstract |
Compounds of the formulasn andn wherein R is lower-alkyl or substituted-lower-alkyl; R 1 , R 2 , R 3 and R 4 are each hydrogen, lower-alkyl or substituted lower-alkyl; R 5 is hydrogen, lower-alkyl, halogen, nitro, lower-alkoxy, lower-alkylthio or trifluoromethyl; R 6 is lower-alkyl; X is 0 or a single bond; and n is an integer from 3 to 9, are useful as antiviral agents, especially against picomaviruses. |