7-(3-Dimethylamino-pyrrolidin-1-yl)-6-fluoro-4-oxo-1-thiazol-2-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester

7-(4-Amino-piperidin-1-yl)-6-fluoro-4-oxo-1-thiazol-2-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester

ethyl (R)-7-(3-amino-1-pyrrolidinyl)-6-fluoro-1,4-dihydro-4-oxo-1-(2-thiazolyl)-1,8-naphthyridine-3-carboxylate

7-(2-Aminomethyl-morpholin-4-yl)-6-fluoro-4-oxo-1-thiazol-2-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester

7-((3S,4S)-3-Amino-4-methoxy-pyrrolidin-1-yl)-6-fluoro-4-oxo-1-thiazol-2-yl-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester