A compound of the formula [I]； ** (See formula) ** wherein R1 is a cycloalkyl group or an unsubstituted alkyl group； R22 is 1) an aryl group optionally substituted with an alkoxy group, an alkoxy group substituted with an alkoxy group, an alkoxy group substituted with an alkylcarbonylamino group, an alkoxy group substituted with an arylcarbonylamino group, an alkoxy group substituted with a substituted carbonylamino group with heterocycle, an alkoxy group substituted with a cycloalkylcarbonylamino group, an alkoxy group substituted with an alkoxycarbonylamino group, an alkyl group substituted with an alkoxycarbonylamino group, an alkyl group substituted with an alkoxy group substituted with an alkoxy group, an alkoxy group substituted with a aryl group, a hydroxyl group, an alkyl group, an alkyl group substituted with an alkoxy group, an oxo group, a halogen atom, an alkoxy group substituted with a halogen atom, an alkyl group substituted with a halogen atom, a aryloxy group, an aryl group, an aryl group substituted with an alkoxy group, a heterocyclic group, a cyano group, a gr C2-C7 alkanoyl group, a carbamoyl group or a carbamoyl group substituted with an alkyl group, 2) a tetrahydronaphthyl group optionally substituted with an alkoxy group, an alkoxy group substituted with an alkoxy group, an alkoxy group substituted with an alkylcarbonylamino group, a alkoxy group substituted with an arylcarbonylamino group, an alkoxy group substituted with a carbonylamino group substituted with heterocycle, an alkoxy group substituted with a cycloalkylcarbonylamino group, an alkoxy group substituted with an alkoxycarbonylamino group, an alkyl group substituted with an alkoxycarbonylamino group, an alkyl group substituted with an alkoxy group substituted with an alkoxy group, an alkoxy group substituted with an aryl group, a hydroxyl group, an alkyl group, an alkyl group substituted with an alkoxy group, an oxo group, a halogen atom, a substituted alkoxy group with a halogen at
