NOVEL POLYMORPHS OF GEMIFLOXACIN MESYLATE

摘要

The present invention provides novel crystalline sesquihydrate form 1, sesquihydrate form 2, anhydrous form 3 and anhydrous form 4 of gemifloxacin mesylate, processes for their preparation and pharmaceutical compositions containing them. The present invention also provides gemifloxacin mesylate acetic acid solvate, gemifloxacin mesylate N-methylpyrrolidone solvate and gemifloxacin mesylate 1,4- dioxane solvate; and processes for their preparation.