| abstract |
Provided are: a fused heterocyclic compound that has an excellent PDE10A inhibitory effect; and a use of the fused heterocyclic compound.nA compound represented by formula (I) or a salt thereof.n(In the formula, R 1 represents an optionally substituted C 1-6 alkoxy group or a hydroxy group; each of R 2 and R 3 independently represents a substituent, or alternatively, R 2 and R 3 combine together to form an optionally substituted C 3-6 cycloalkane group together with an adjacent carbon atom; R 4 represents a hydrogen atom or a substituent; L represents -Y-, -O-Y- or -NR 5 -Y- (wherein R 5 represents a hydrogen atom or a substituent, and Y represents an optionally substituted C 1-6 alkylene group); and ring A represents an optionally substituted heterocyclic ring.) |