7-Chloro-5-ethyl-1,4-dihydro-4-oxoquinoline-2-carboxylic acid
7-Chloro-5-ethyl-1,4-dihydro-4-oxoquinoline-2-carboxylic acid ??
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7-Chloro-5-ethyl-1,4-dihydro-4-oxoquinoline-2-carboxylic acid C??? ??, ??, ??
7-Chloro-5-ethyl-1,4-dihydro-4-oxoquinoline-2-carboxylic acid ?? ?? ? ???
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7-Chloro-5-ethyl-1,4-dihydro-4-oxoquinoline-2-carboxylic acid ?? ??
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