Patent ID: 7259187

Claim:
A compound represented by the following general formula (I) or a salt thereof: wherein R 1 , R 2 , R 3 and R 4 independently represent hydrogen atom, a C 1-10 alkyl group, said alkyl group may be substituted, or a C 1-6 alkoxyl group, and when R 2 and R 3 are adjacent to each other, they may combine together with carbon atoms of the phenyl group to which R 2 and R 3 bind to form a 5- or 6-membered ring, said ring may have one or more C 1-4 alkyl groups or one condensed benzene ring which may have one or more substituents on the ring; the ring represented by Ar represents an aryl ring; X represents a single bond, —N═N—, —CON(R 5 )—, wherein R 5 represents hydrogen atom or a C 1-6 alkyl group, —(C═C) n CON(R 6 )—, wherein n represents an integer of 1 to 3, and R 6 represents hydrogen atom or a C 1-6 alkyl group, —N(R 7 )CON(R 8 )—, R 7 and R 8 represent hydrogen atom or a C 1-6 alkyl group, —SO 2 N(R 9 )—, R 9 represents hydrogen atom or a C 1-6 alkyl group, —N(R 10 )—, R 10 represents hydrogen atom, a C 1-6 alkyl group, or a C 1-6 acyl group, a C 1-6 alkylene group, said alkylene group may contain one or more unsaturated bonds or a cyclic structure, or an aryldiyl group; Y represents hydrogen atom, —OR 11 , R 11 represents hydrogen atom, a C 1-6 alkyl group, or a C 1-6 acyl group, —NHR 12 , R 12 represents hydrogen atom, a C 1-6 alkyl group, a C 1-6 acyl group, or amino group, or a halogen atom.