3-(N-acetyl-N-n-propylamino)pyrrolidine 、
依诺沙星杂质3 以yield 7-[3-(N-acetyl-n-propylamino)-1-pyrrolidinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid的产率得到7-[3-(N-acetyl-n-propylamino)-1-pyrrolidinyl]-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid