Bicyclic nitrogen-containing aromatic heterocyclic amide compound

A compound of the formula (I) or a salt thereof:

• wherein R1 is aryl or monocyclic nitrogen-containing heteroaryl, each of which is optionally substituted with at least one substituent selected from the group consisting of halogen, lower alkyl, —O-lower alkyl, halogeno-lower alkyl, —O-halogeno-lower alkyl, —CN, dimethylamino, and cycloalkyl;
• wherein X is CH, N, or C;
• is a single bond if X is CH or N or is a double bond if X is C;
• Y is a cyclic group of any of formulae Y-1 to Y-11:
• Y1 is CRh or N;
• Y2 is CRi or N;
• Y1 and Y2 are not both N;
• Ra, Rb, and Ri are each independently H or halogen;
• Rb is H or lower alkyl;
• Rc is lower alkyl;
• Y3 is CH or N;
• Rd and Re are each independently H or lower alkyl;
• Rf is H or lower alkyl;
• Y4 is O or S;
• Y5 is CH or N;
• Y6 is CH or N;
• Rg is H or lower alkyl;
• R2 is H or lower alkyl;
• and
• either
• R3 and R4 are each independently H, halogen, lower alkyl, —O-lower alkyl, halogeno-lower alkyl, —O-halogeno-lower alkyl, cycloalkyl, or —CN,
• or
• R3 and R4 form 2,2-difluoro-1,3-benzodioxole with the benzene ring to which R3 and R4 are bonded.