4''-O-[3-({2-[(3-carboxy-1,4-dihydro-1-ethyl-4-oxoquinolin-7-yl)amino]ethyl}amino)propanoyl]-6-O-methylerythromycin A

4''-O-[3-({2-[(3-carboxy-1-cyclopropyl-1,4-dihydro-4-oxoquinolin-7-yl)amino]ethyl}amino)propanoyl]-6-O-methylerythromycin A

4''-O-(3-{4-[3-(1-cyclopropyl-3-ethoxycarbonyl-1,4-dihydro-4-oxo-quinolin-6-yl)prop-2-ynyl]piperazin-1-yl}propionyl)-6-O-methyl-erythromycin A

4''-O-{3-[3-(3-carboxy-1,4-dihydro-1-dimethylamino-4-oxo-6-quinolinyl)propylamino]propionyl}-6-O-methylerythromycin A

4''-O-[3-({2-[(3-carboxy-1,4-dihydro-1-methyl-4-oxoquinolin-7-yl)amino]ethyl}amino)propanoyl]-6-O-methylerythromycin A