7-[3-(N,N'-Diacetyl-hydrazino)-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84%的产率得到1-Ethyl-6-fluoro-7-(3-hydrazino-pyrrolidin-1-yl)-4-oxo-1,4-dihydro-[1,8]naphthyridine-3-carboxylic acid; hydrochloride