NOVEL CRYSTAL FORM OF ANHYDROUS 7-(1α.5α.6α-6-AMINO-3-AZABICYCLO3.1.0HEX-3-YL)-6-FLUORO-1,(2,4-DIFLUOROPHENYL)-1,4-DIHYDRO-4-OXO-1, 8-NAPHTHYRIDINE-3-CARBOXYLIC ACID, METHANESULFONIC ACID, METHANESULFONIC ACID SALT

摘要

Theanhydrate of y-9[l1a, 5a, 6a, 6--amino-3-azabicyclo[3.1.0]hex-3-yl-6-fluoro-l-(2,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid, methanesulfonic acid salt has advantageous stability for formulation as an antibacterial agent.