| abstract |
The nitrogen-containing heterocyclic carboxamide derivatives or salts thereof represented by the following general formulas are useful for the prophylactic treatment of viral infections, in particular influenza virus infections.n n n n n n n n Wherein ring A is a substituted or unsubstituted pyrazine, pyrimidine, pyridazine or triazine ring, R 1 is 0 or OH, R 2 is a hydrogen atom, an acyl group, or a substituted or unsubstituted carbamoylalkyl group or carboxy An alkyl group is shown, and the dotted line represents a single bond or a double bond.)n n n Influenza virus. Nitrogen-containing heterocyclic carboxamide derivatives |