1-ethyl-6-iodo-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

6-(2-carbamoyl-ethyl)-1-ethyl-4-oxo-1,4-dihydro-quinolone-3-carboxylic acid ethyl ester

6-[3-(5-carboxy-pentyloxy)-propyn-1-yl]-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

6-[2-({2-[(2-aminoethyl)oxy]ethyl}oxy)ethyl]-1-ethyl-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid hydrochloride

6-[2-({2-[(2-aminoethyl)oxy]ethyl}oxy)ethyl]-1-ethyl-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid

6-(2-ethyloxycarbonylamino-ethyl)-1-ethyl-4-oxo-1,4-dihydro-quinolin-3-carboxylic acid ethyl ester

6-(3-amino-propyl)-1-ethyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid sodium salt

4''-O-[(3-{4-[(2E)-3-(3-carboxy-1-ethyl-4-oxo-1,4-dihydro-6-quinolinyl)-2-propen-1-yl]-1-piperazinyl}propyl)]-9-deoxo-9a-methyl-9a-aza-9a-homoerythromycin A

6-(2-amino-ethyl)-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid ethyl ester hydroiodide salt

6-[3-({2-[(2-cyanoethyl)oxy]ethyl}oxy)propyl]-1-ethyl-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid

1-ethyl-4-oxo-6-piperazin-1-yl-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester

1-ethyl-6-{3-[(2-hydroxyethyl)oxy]propyl}-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid

4''-O-{6-[3-(3-carboxy-1-ethyl-4-oxo-1,4-dihydro-quinolin-6-yl)-propyn-2-yloxy]-hexanoyl}-azithromycin

1-ethyl-4-oxo-6-piperazin-1-yl-1,4-dihydro-quinoline-3-carboxylic acid

ethyl 6-[(1E)-3-(4-{[(1,1-dimethylethyl)oxy]carbonyl}-1-piperazinyl)-1-propen-1-yl]-1-ethyl-4-oxo-1,4-dihydro-3-quinolinecarboxylate

4''-O-[(3-{4-[3-(3-carboxy-1-ethyl-4-oxo-1,4-dihydro-6-quinolinyl)propyl]-1-piperazinyl}propyl)]-9-deoxo-9a-methyl-9a-aza-9a-homoerythromycin A

ethyl 1-ethyl-4-oxo-6-[(1E)-3-(1-piperazinyl)-1-propen-1-yl]-1,4-dihydro-3-quinolinecarboxylate

6-[3-({2-[(2-carboxyethyl)oxy]ethyl}oxy)propyl]-1-ethyl-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid

1-ethyl-4-oxo-6-[3-({2-[(phenylmethyl)oxy]ethyl}oxy)-1-propyn-1-yl]-1,4-dihydro-3-quinolinecarboxylic acid