(RS)-7,8-difluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid 、 3-Amino-3-ethylazetidine dimethanesulphonate 在
8-(3-Amino-3-ethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3carboxylic acid 作用下,
以1.46 g of 8-(3-amino-3-ethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3-carboxylic acid are obtained in the form of a yellow solid, which的产率得到8-(3-Amino-3-ethyl-1-azetidinyl)-7-fluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine-3carboxylic acid