CPC C07D 401/06 (2013.01) [A61P 1/04 (2018.01); C07D 409/06 (2013.01)] | 11 Claims |
1. A compound of formula I, or a pharmaceutically acceptable salt thereof:
wherein:
R1 is pyrrolyl, pyridinyl, or pyrazinyl, each of which is optionally substituted with one or more groups selected from alkyl and halo; and
R2 is alkyl.
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