1,8-Naphthyridin-2(1H)-one, 3-methyl-1-phenyl- 1-Phenyl-1,2-dihydro-2-oxo-3-methyl-1,8-naphthyridine 116288-88-1 3-Methyl-1-phenyl-1,8-naphthyridin-2(1H)-one