N-{2-[2-(D-mannomethylene)hydrazinyl]-1-isopropyl-2-oxoethyl}-1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthy-ridine-3-carboxamide

4-oxo-N-{2-oxo-1-isopropyl-2-[(2E)-2-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)hydrazinyl]-ethyl}-1-ethyl-7-methyl-1,4-dihydro-1,8-naphthyridine-3-carboxamide

N-(1-((1,3-dioxoisoindolin-2-yl)amino)-3-methyl-1-oxobutan-2-yl)-1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxamide

N-{2-[(4,5,6,7-tetrachloro-1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)amino]-1-isopropyl-2-oxo-ethyl}-1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxamide