An active ingredient is a compound represented by the general formula [I]:
[wherein R
1
and R
2
represent a lower alkyl group, a C
3-6
cycloalkyl group or the like, X
1
and X
2
represent methine, an Ar—Y
1
—Y
2
—Y
3
-substituted methine or the like, however either of them is an Ar—Y
1
—Y
2
—Y
3
-substituted methine, X
3
to X
8
represent methine, —N— or the like, Y
1
and Y
3
represent a single bond, —O— or the like, Y
2
represent a single bond, a lower alkylene group or the like, W represent —(O)—(CH
2
)n-(O)— or the like, n represents an integer of 1 to 4, L and Z
2
represent a single bond or a methylene group, Z
1
represents a single bond, a C
1-4
alkylene group or the like, and Ar represents an aromatic carbocyclic group or the like]. The compound acts as a melanin-concentrating hormone receptor antagonist and useful as a therapeutic agent for obesity or the like.