preparation of sitagliptin impurity 13_kain industrial additive
background and overview[1] sitagliptin, chemical name (2r)-4-oxo-4-[3-trifluoromethyl-5,6-dihydro[1,2,4]triazole[4 , 3-a]pyrazin-7(8h)-yl]-1-(2,4,5-trifluorophenyl)-butan-2-amine, which is a dipeptide…
