CPC C07D 401/12 (2013.01) [A61P 1/04 (2018.01); A61P 29/00 (2018.01)] | 9 Claims |
1. A compound represented by the following Chemical Formula 2 or a pharmaceutically acceptable salt thereof:
in the Chemical Formula 2,
X1 is F;
X2 is hydrogen or F;
R1 is methyl; and
R2 is methoxy, ethoxy, methyl or ethyl.
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