A compound represented by Chemical Formula I, its racemate or a pharmaceutically acceptable salt thereof: ** Formula ** wherein ring A is an aryl group or a heteroaryl group selected from the group consisting of Chemical Formulas (II) a (VIII): ** Formula ** in which X is O, S or NY, Y is selected from the group consisting of H, a linear or branched alkyl group of C1 to C5 and a cyclic alkyl group of C3 to C5 , R1, which is attached to any one of the aromatic carbons of ring A, is selected from the group consisting of H； a linear or branched C1 to C5 alkyl group； a C3 to C5 cyclic alkyl group； O-R3； - N (R4) R5； and a phenyl group, pyridine group, furan group, thiazole group, thiophene group, hydro-1H-isoquinoline group and isoxazole group, being one to three hydrogen atoms substituted with R2, R2 is selected from the group consisting of H, a halogen atom, a linear or branched alkyl group of C1 to C5, a cyclic alkyl group of C3 to C5, a trifluoromethyl group, a nitro group, -O-R6 and -N (R7) R8； R3 is selected from the group consisting of H, a linear or branched alkyl group of C1 to C4, a cyclic alkyl group of C3 to C5, a -CH2-cyclic alkyl of C5 to C6, a -CH2-aryl of C6 to C10 and a -CH2-heteroaryl of C2 to C8 with at least one of O, N and S in the aromatic ring； R4 and R5, which are the same or different from each other, are independently selected from the group consisting of H and a linear or branched C1 to C5 alkyl group, or R4 and R5 join to form a 5-7 membered ring , wherein the 5-7 member ring is an unsubstituted one or has a phenyl group as a substituent； R6 is selected from the group consisting of H and a linear or branched alkyl group of C1 to C3； and R7 and R8, which are the same or different from each other, are each independently selected from the group consisting of H and a linear or branched alkyl group of C1 to C3, or R7 and R8 are joined to form a ring of 5 -7 members.Un compuesto representado por la Fórmula Química I, su racemato o una sal farmacéut
