| CPC C07C 317/48 (2013.01) [A61K 31/18 (2013.01); A61K 31/381 (2013.01); A61K 31/4406 (2013.01); A61P 31/00 (2018.01); C07D 213/78 (2013.01); C07D 333/34 (2013.01)] | 8 Claims |

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1. A compound having the formula I:
![]() or a pharmaceutically acceptable salt, ester, stereoisomer, or solvate thereof, wherein:
R is a direct bond, —CH2, or —CH2(Br);
Ar is an optionally substituted phenyl, pyridine, naphthalene, or thiophene being optionally substituted with one or more substituents selected from the group consisting of hydrogen, bromine, COCH3, NO2, CF3, OCH3, methyl, isopropyl, and a second optionally substituted phenyl;
wherein the second optionally substituted phenyl is substituted with a hydrogen, methyl, or methoxy.
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