| abstract |
Disclosed is an aryl-substituted nitrogen-containing heterocyclic compound represented by the formula (I) below or a pharmaceutically acceptable salt thereof. This compound serves as nociceptin receptor antagonist and is useful as a pharmaceutical agent for treating diseases associated with a nociceptin receptor. (I) n n n n n n n n n n [in the formula, A 1 , A 2 and A 3 independently represent a carbon atom or a nitrogen atom, and one or two of A 1 , A 2 and A 3 represent a carbon atom; R 1 represents a lower alkyl group or the like; R 2 represents a phenyl group which may be substituted with a halogen atom or the like; R 3 represents a hydrogen atom, a lower alkyl group or the like; and R 4 represents a lower alkyl group or the like.] |