英文别名Sitagliptin Impurity 21; (R)-Sitagliptin rac-Fumarate Adduct; 2-[[(2R)-4-oxo-4-[3-(trifluoromethyl)-6,8-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrazin-7-yl]-1-(2,4,5-trifluorophenyl)butan-2-yl]amino]butanedioic acid; N-[(1R)-3-[5,6-Dihydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-a]pyrazin-7(8H)-yl]-3-oxo-1-[(2,4,5-trifluorophenyl)methyl]propyl]-L-aspartic acid; Sitagliptin Maleate adduct; Sitagliptin Fumarate Adduct; Sitagliptin Impurity FP-A; Sitagliptin FP Impurity A 
