The present invention provides a compound of the Formula II:
wherein A is:
R1 is CH3, CF3, or F;
R2 is H, CH3, or F;
R3 is CH3, OCH3, OH, F;
R4 is OH or CH2OH; and
X is CH or N;
or a pharmaceutically acceptable salt thereof.
本发明提供了一种化合物II的公式:
其中,A是:R1是
CH3,
CF3或F;R2是H, 或F;R3是 ,O ,OH,F;R4是OH或CH2OH;X是CH或N;或其药学上可接受的盐。