2,3-Dihydro-7-phenylimidazo(1,2-a)pyridin-5(1H)-one 5-Oxo-7-phenyl-1,2,3,5-tetrahydroimidazo(1,2-a)pyridine 66066-06-6 Imidazo(1,2-a)pyridin-5(1H)-one, 2,3-dihydro-7-phenyl-