Saxagliptin Impurity 33

(1S,3R,5S)-2-tert-Butyl 3-ethyl 2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate Saxagliptin Impurity 5 (Epoxy saxaglliptin) 1H-Cyclopropa[4,5]pyrrolo[1,2-a]pyrazine-3,6-dione, hexahydro-4-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)-, (1aS,4S,6aR,7aS)- (1R,3R,5R)-2-Azabicyclo[3.1.0]hexane-3-carboxamide 2,2,2-trifluoroacetate Saxagliptin Impurity 34

Saxagliptin Impurity 6 3H-Cyclopropa[4,5]pyrrolo[1,2-a]pyrazin-3-one, 6-aMino-1,1a,4,6a,7,7a-hexahydro-4-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)-, (1aS,4S,6aR,7aS)- Saxagliptin IMpurity 1 Saxagliptin Impurity 15 (S) - N- Boc- adamantylglycine

1H-Pyrrole-1-carboxylic acid, 2-(aMinocarbonyl)-2,3-dihydro-, 1,1-diMethylethyl ester, (2S)- Saxagliptin IMpurity 2 (R)-N-Boc-3-hydroxyadaMantylglycine 3-Hydroxy-1-AdaMantane Carboxylic Acid Tricyclo[3.3.1.13,7]decane-1-acetic acid, α-[[(1,1-diMethylethoxy)carbonyl]aMino]-3,5-dihydroxy-, (αS)-

(1S,3S,5S)-2-(tert-Butoxycarbonyl)-2-azabicyclo[3.1.0]hexane-3-carboxylic acid (1R,3S,5R)-2-Azabicyclo[3.1.0]hexane-3-carboxamide 2,2,2-trifluoroacetic acid Saxagliptin Impurity 16