7-[3-(Acetyl-propyl-amino)-pyrrolidin-1-yl]-1-ethyl-6-fluoro-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid ethyl ester 在
盐酸 作用下,
以91%的产率得到1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(3-N-propylamino-1-pyrrolidinyl)-1,8-naphthyridine-3-carboxylic acid hydrochloride