New crystalline form of a DPP-IV

The crystalline form II of the besylate (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 having a diffraction pattern characteristic X-ray powder expressed as 2θ peaks at 5.69, July 5, 45, 10 08, 11.41, 13.09, 18.34, 22.52 and 22.97 + - 0.2 degrees two theta.