Compounds of the formula: ##STR1## where the formula variables are as defined herein, are disclosed that advantageously inhibit or block the biological activity of the picornaviral 3C protease. Also disclosed are compounds of the formula: ##STR2## where the formula variables are as defined herein that advantageously inhibit or block the biological activity of the picornaviral 3C protease. These compounds, as well as pharmaceutical compositions containing these compounds, are useful for treating patients or hosts infected with one or more picornaviruses, such as rhinovirus 3C proteases. Intermediates and synthetic methods for preparing such compounds are also described.

Compostos da fórmula: ## do ## STR1 onde as variáveis da fórmula são como definidas nisto, são divulgados que vantajosamente inibem ou obstruem a atividade biológica do protease 3C picornaviral. São divulgados também os compostos da fórmula: ## do ## STR2 onde as variáveis da fórmula são como definidas nisto que vantajosamente inibem ou obstruem a atividade biológica do protease 3C picornaviral. Estes compostos, as.well.as as composições pharmaceutical que contêm estes compostos, são úteis para tratar os pacientes ou os anfitriões infected com um ou mais picornaviruses, tais como proteases do rhinovirus 3C. Os intermediários e os métodos sintéticos para preparar tais compostos são descritos também.

 
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