(Rac)-LY-3381916

(Rac)-LY-3381916 Rac)-IDO1-IN-5; Example 1) is a racemate of LY-3381916. LY-3381916 is a potent, selective and brain penetrated inhibitor of Indoleamine 2,3-Dioxygenase 1 (IDO1) activity, binds to apo-IDO1 lacking heme rather than mature heme-bound IDO1.