Nitrogen-containing heterocyclic carboxamide derivatives or salts thereof and antiviral agents comprising the same
申请人:——
公开号:US20020013316A1
公开(公告)日:2002-01-31
Nitrogen-containing heterocyclic carboxamide derivatives represented by the following general formula:
1
wherein ring A is a substituted or unsubstituted pyrazine, pyrimidine, pyridazine or triazine ring; R
1
is O or OH; R
2
is a hydrogen atom, an acyl group or a substituted or unsubstituted carbamoylalkyl or carboxyalkyl group; and the broken line represents a single bond or a double bond; or salts thereof are useful for preventing and treating virus infections and especially influenza virus infections.