1,8-Naphthyridine-3-carboxylic acid, 1-(1,1-dimethylethyl)-7-(3,5-dimethyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo- 1-tert-butyl-7-(3,5-dimethyl-piperazin-1-yl)-6-fluoro-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid 182868-99-1 AIDS-022417 AIDS022417 PD 163049