7-piperazinyl-6-fluoro-1-<1,1-dimethyl-2-<<(1,1-dimethylethyl)dimethylsilyl>oxy>ethyl>-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester

6-Fluoro-4-oxo-7-pyrrolidin-1-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester

5-Chloro-3-fluoro-2-pyrrolidin-1-yl-[1,8]naphthyridine

N1-(6-Fluoro-7-pyrrolidin-1-yl-[1,8]naphthyridin-4-yl)-ethane-1,2-diamine