| abstract |
A compound represented by the following Formula 1 or pharmaceutically acceptable salts thereof: ** (See formula) ** wherein, X and Y are each independently -CH2- or -O-; m is 1; R1 is halogen, C1-C4 alkyl or C3-C7 cycloalkyl; R2 and R3 are each independently hydrogen, halogen, C1-C4 alkyl, C2-C4 alkenyl, C1-C4 alkoxy, -OCF3, -SR5, or phenyl (wherein at least one hydrogen of said C1-C4 alkyl may each be independently unsubstituted or substituted with halogen); and R5 is C1-C4 alkyl. |