- ARYL-SUBSTITUTED NITROGEN-CONTAINING HETEROCYCLIC COMPOUND
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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 a nociceptin receptor antagonist and is useful as a pharmaceutical agent for treating diseases associated with a nociceptin receptor. (I) [In the formula, A1, A2 and A3 independently represent a carbon atom or a nitrogen atom, and one or two of A1, A2 and A3 represent a carbon atom; R1 represents a lower alkyl group or the like; R2 represents a phenyl group which may be substituted by a halogen atom or the like; R3 represents a hydrogen atom, a lower alkyl group or the like; and R4 represents a lower alkyl group or the like.]
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Page/Page column 45-46
(2008/06/13)
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