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

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

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

ethyl 1-ethyl-6-(3-hydroxy-1-propyn-1-yl)-4-oxo-1,4-dihydro-3-quinolinecarboxylate

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