7-[3-(Acetyl-ethyl-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82%的产率得到1-Ethyl-7-(3-ethylamino-pyrrolidin-1-yl)-6-fluoro-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid; hydrochloride