1,6-naphthyridine-3-carboxylic acid, 6-(4-amino-3-pyridinyl)-5,6-dihydro-2-methyl-5-oxo-, ethyl ester InChI=1/C17H16N4O3/c1-3-24-17(23)11-8-12-14(20-10(11)2)5-7-21(16(12)22)15-9-19-6-4-13(15)18/h4-9H,3H2,1-2H3,(H2,18,19 ethyl 6-(4-aminopyridin-3-yl)-2-methyl-5-oxo-5,6-dihydro-1,6-naphthyridine-3-carboxylate