(2S,4S)-4-amino-2-methylpyrrolidine-1-carboxylic acid tert-butyl ester
(R)-2-Oxa-5-aza-bicyclo[2.2.1]heptane-5-carboxylic acid tert-butyl ester
7-((2S,4S)-4-Acetylamino-2-methyl-pyrrolidin-1-yl)-6-fluoro-1-(4-fluoro-phenyl)-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester
(2'S,4'S)-7-(4'-amino-2'-methylpyrrolidinyl)-1-(p-fluorophenyl)-1,4-dihydro-6-fluoro-4-oxoquinoline-3-carboxylic acid hydrochloride
(2'S,4'S)-7-(4'-amino-2'-methylpyrrolidinyl)-1-(2,4-difluorophenyl)-1,4-dihydro-6-fluoro-4-oxoquinoline-3-carboxylic acid hydrochloride