FUSED HETEROCYCLIC COMPOUND

摘要

Provided are: a fused heterocyclic compound that has an excellent PDE10A inhibitory effect; and a use of the fused heterocyclic compound. A compound represented by formula (I) or a salt thereof. (In the formula, R1 represents an optionally substituted C1-6 alkoxy group or a hydroxy group; each of R2 and R3 independently represents a substituent, or alternatively, R2 and R3 combine together to form an optionally substituted C3-6 cycloalkane group together with an adjacent carbon atom; R4 represents a hydrogen atom or a substituent; L represents -Y-, -O-Y- or -NR5-Y- (wherein R5 represents a hydrogen atom or a substituent, and Y represents an optionally substituted C1-6 alkylene group); and ring A represents an optionally substituted heterocyclic ring.)