1 5L0 1-[1-(imidazo[1,2-a]pyridin-5-yl)-7-(morpholin-4-yl)indolizin-3-yl]ethanone 1.000 2 IR4 1-[7-(morpholin-4-yl)-1-(pyridin-2-yl)indolizin-3-yl]ethanone 0.889