A stable polymorph of the salt of (2R) -4-oxo-4- 3- (trifluoromethyl) -5,6-dihydro 1,2,4-triazole 3,4-a pyrazin-7 (8H) -il -1- (2,4,5-trifluorophenyl) butan-2-amine with L-tartaric acid

摘要

A crystalline form of the salt of sitagliptin with L-tartaric acid, characterized by the following reflections in the X-ray powder pattern: 5.9; 9.8; 14.2; 19.5; 23.8 and 26.2 ± 0.2 ° 2-theta, using radiation CuKα λ = 1,542 Å = 0.1542 nm.