Patent ID: 7915297

Claim:
An isoxazole derivative of the following Chemical Formula 1, or a pharmaceutically acceptable salt thereof: wherein, R 1 is an aryl group selected from the group consisting of thienyl, furanyl and phenyl that may be unsubstituted or substituted with one or more substituents selected from the group consisting of acyl, amino, carboalkoxy, carboxy, carboxyamino, —O-carbamoyl, cyano, halo, hydroxy, nitro, thio, alkyl, cycloalkyl, aryl, alkoxy, aryloxy, sulfoxy and guanido; R 2 is hydrogen; and X is a substituent of the following Chemical Formula 2; wherein R 3 is hydrogen, R4 is an alkyl group substituted with an aryl group selected from the group consisting of phenyl, imidazolyl, triazolyl, and pyridyl, wherein the alkyl group is further unsubstituted and said phenyl, imidazolyl, triazolyl, and pyridyl may be unsubstituted or substituted with one or more substituents selected from the group consisting of amino, carboalkoxy, carboxy, halo, hydroxy, nitro, alkyl, and alkoxy wherein, when R4 is an alkyl group substituted with an aryl group and R1 is substituted or unsubstituted phenyl, said aryl group is imidazolyl or triazolyl.