Patent ID: 7393866

Claim:
A compound represented by the formula (I) represents a divalent residue of benzene, cyclohexane or naphthalene, or a group: wherein the divalent residue is optionally substituted with an alkyl group having from 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylthio group having 1 to 6 carbon atoms, an alkylsulfonyl group having 1 to 6 carbon atoms, an alkylcarbonyl group having 1 to 6 carbon atoms, a halogen atom, an amino group, an amino group substituted with an alkyl group having 1 to 6 carbon atoms, an aryl group, an aralkyl group or an alkylenedioxy group, Het represents a 2,4-substitutedpyridin-3-yl group wherein each substituent at the 2 and 4 positions of the pyridine ring is an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms or an alkylthio group having 1 to 3 carbon atoms, and the 2,4-substituted-pyridin-3-yl group is optionally substituted with an alkyl group having 1 to 6 carbon atoms at 6 position of the pyridine ring; X represents sulfur; Y represents —NR 4 —, an oxygen atom, a sulfur atom, a sulfoxide or a sulfone; Z represents a single bond; R 4 represents a hydrogen atom, a lower alkyl group or an aryl group; and n is an integer of from 2 to 15, or a salt thereof.