| CPC C07D 213/52 (2013.01) [C07F 9/4071 (2013.01)] | 20 Claims |
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1. A compound represented by Chemical Formula 1 below or a pharmaceutically acceptable salt thereof:
![]() wherein, in the Chemical Formula 1,
![]() R1 is a halogen,
R2 is hydrogen or C1-4 alkyl,
n is an integer of 1 to 5, and
X is a halogen.
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