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

摘要

The anhydrate of 7-([1'alpha', 5'alpha', 6'alpha']-6-amino-3-azabicyclo[3.1.0]hex-3-yl)-6-fluoro-1-(2 ,4-difluorophenyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-car boxylic acid, methanesulfonic acid salt has advantageous stability for formulation as an antibacterial agent.