Saxagliptin Impurity 14

Saxagliptin Impurity 6 Saxagliptin (1S,3R,5S)-2-tert-Butyl 3-ethyl 2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate Tricyclo[3.3.1.13,7]decane-1-acetic acid, α-[[(1,1-diMethylethoxy)carbonyl]aMino]-3,5-dihydroxy-, (αS)- Saxagliptin Impurity 11

Saxagliptin Impurity 13 Saxagliptin Impurity 18 Saxagliptin IMpurity 2 Saxagliptin Impurity 10 Saxagliptin Impurity 17

Saxagliptin Impurity 12 Saxagliptin Impurity 15 Saxagliptin IMpurity 1 Saxagliptin Impurity 16 2-Azabicyclo[3.1.0]hexane-2-carboxylic acid, 3-(aMinocarbonyl)-, 1,1-diMethylethyl ester, (1S,3R,5S)-