| CPC C07D 513/04 (2013.01) [A61K 31/437 (2013.01); A61P 31/04 (2018.01); C07C 303/28 (2013.01); C07C 2603/82 (2017.05)] | 11 Claims |

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1. A compound of formula I, a pharmaceutically acceptable salt, or a tautomer thereof:
![]() wherein R is a phenyl group substituted with an electron withdrawing group or a phenyl group substituted with an electron donating group.
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