Krishnan R, Lang S A
J Pharm Sci. 1986 Dec;75(12):1185-7. doi: 10.1002/jps.2600751214.
Twelve 6,8-disubstituted-1-ethyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acid derivatives were prepared and evaluated for their antibacterial activity. Among these, only the 6,8-difluoroquinolinone-3-carboxylic acid showed moderate activity.