| CPC A61K 31/137 (2013.01) [A61K 45/06 (2013.01); C07C 217/60 (2013.01); C07B 2200/05 (2013.01)] | 20 Claims |

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1. A compound of Formula (A):
![]() or an enantiomer or enantiomerically enriched mixture thereof, or a pharmaceutically acceptable salt, prodrug, hydrate, or solvate of any of the foregoing, wherein:
R1 is —CH3, —CD3, or —CF3;
R2 is —CH3, —CD3, or —CF3; and
X is —CH3, —CD3, or —CF3;
provided that when both R1 and R2 are —CH3, X is —CD3 or —CF3.
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