Patent ID: 8497382

Claim:
A carboxylic acid derivative containing a thiazole ring represented by the following formula (I) wherein R 1 and R 2 are the same or different and each is a hydrogen atom or an alkyl group optionally having substituent(s), or R 1 and R 2 are bonded to each other to form a cycloalkyl group optionally having substituent(s); R 3 is a hydrogen atom or an alkyl group optionally having substituent(s); R 4 is a hydrogen atom, an alkyl group optionally having substituent(s) or an aryl group optionally having substituent(s); m is an integer of 0 to 3; X is a bond, an oxygen atom or a sulfur atom; Y is a carbonyl group or a group represented by —CH(OR 5 )— wherein R 5 is a hydrogen atom or an alkyl group optionally having substituent(s); and Z is a halogen atom, an alkyl group optionally having substituent(s), a cycloalkyl group optionally having substituent(s), an aryl group optionally having substituent(s), an arylalkyl group optionally having substituent(s), an arylalkenyl group optionally having substituent(s), an aryloxyalkyl group optionally having substituent(s), a heteroaryl group optionally having substituent(s) or a heteroarylalkyl group optionally having substituent(s), or a pharmaceutically acceptable salt thereof.