The invention relates to a compound of a general formula (I): wherein Ar.sup.1 represents a group formed from an aromatic ring selected from a group consisting of indole, 1H-indazole, 2H-indazole, 1H-thieno[2,3-c]pyrazole, 1H-pyrazolo[3,4-b]pyridine, benzo[b]furan, benzimidazole, benzoxazole, 1,2-benzisoxazole and imidazo[1,2-a]pyridine; R.sup.1 and R.sup.2 each represent a hydrogen atom, a halogen atom, a cyano group, a C2-C6 alkenyl group, a C1-C6 alkoxy group, a halo-C1-C6 alkoxy group, a cyclo-C3-C6 alkyloxy group, a C2-C7 alkanoyl group, a halo-C2-C7 alkanoyl group, a C2-C7 alkoxycarbonyl group, a halo-C2-C7 alkoxycarbonyl group, a cyclo-C3-C6 alkyloxycarbonyl group, an aralkyloxycarbonyl group, a carbamoyl-C1-C6 alkoxy group, a carboxy-C2-C6 alkenyl group, or a group of -Q.sup.1-N(R.sup.a)-Q.sup.2-R.sup.b; an optionally-substituted C1-C6 alkyl, aryl or heterocyclic group; or a C1-C6 alkyl or C2-C6 alkenyl group having the aryl or heterocyclic group; R.sup.3 and R.sup.4 each represent a hydrogen atom, a halogen atom, a nitro group, a cyclo-C3-C6 alkyl group, a carbamoyl group optionally substituted with a C1-C6 alkyl or cyclo-C3-C6 alkyl group, or a group of --N(R.sup.e)R.sup.f; an optionally-substituted C2-C7 alkanoyl, C1-C6 alkoxy, C2-C7 alkoxycarbonyl, cyclo-C3-C6 alkyloxycarbonyl, C1-C6 alkylsulfonyl, C1-C6 alkylthio, cyclo-C3-C6 alkyloxy, cyclo-C3-C6 alkyl-C1-C6 alkoxy, cyclo-C3-C6 alkylsulfonyl, cyclo-C3-C6 alkylthio or cyclo-C3-C6 alkyl-C1-C6 alkylthio group; or an optionally-substituted C1-C6 alkyl group; T and U each represent a nitrogen atom or a methine group; and V represents an oxygen atom or a sulfur atom. The compound of the invention is useful as therapeutical agents for various ACC-related diseases.