1,2-Dihydro-4-hydroxy-2-oxo-1-phenyl-N-2-pyrazinyl-1,8-naphthyridine-3-carboxamide 1,8-Naphthyridine-3-carboxamide, 1,2-dihydro-4-hydroxy-2-oxo-1-phenyl-N-2-pyrazinyl- 138305-09-6 4-Hydroxy-2-oxo-1-phenyl-N-(pyrazin-2-yl)-1H-1,8-naphthyridine-3-carboxamide