gentisate, adipate, trifluoroacetic acid salt, crystalline form of hydrochloride, crystalline form of besylate, amorphous besylate and processes for their preparation

摘要

The present invention discloses a new salt of (2R)-4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]-triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-amine (I) i.e. the gentisate salt. The invention also describes the new crystalline and amorphous forms of (2R)-4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]-triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-amine gentisate.