| 摘要 |
<p>Nitrogenous heterocyclic carboxamide derivatives represented by general formula (I), or salts thereof are useful as preventives and therapeutic agents for infections with viruses, particularly influenza virus. In said formula A is an optionally substituted pyrazine, pyrimidine, pyridazine or triazine ring; R1 is O or OH; R2 is hydrogen, acyl, or optionally substituted carbamoylalkyl or carboxyalkyl; and the broken line represents a single or double bond.</p> |
