Carboxilic acid derivatives

A compound represented by the following general formula (I) or a salt thereof:

• wherein
• R1 represents a C6-10 aryl group substituted with a group or groups selected from a halogen atom, a nitro group, a C1-6 alkyl group, a halogenated C1-6 alkyl group, a C1-6 alkoxy group, a halogenated C1-6 alkoxy group, a C1-6 alkylenedioxy group, a C1-6 alkylsulfanyl group, a carboxy group, and an amino group,
• R2 represents a C6-10 aryl group substituted with a group or groups selected from a halogen atom, a nitro group, a C1-6 alkyl group, a halogenated C1-6 alkyl group, a C1-6 alkoxy group, a halogenated C1-6 alkoxy group, a phenyl group, and a carboxy group,
• X represents —CH2—, —CH2CH2—, —CH═CH— or —N(R3)—C(═O)— wherein the nitrogen atom binds to the benzene ring and the carbon atom binds to Y, and R3 represents hydrogen atom, a C1-4 alkyl group or a C7-12 aralkyl group,
• Y represents a carboxy group or a 1H-tetrazol-5-yl group, and
• m represents 0 or 1.