Saxagliptin Imine Impurity

Chemical Name: (1aS,4S,6aR,7aS)-6-Amino-1,1a,4,6a,7,7a-hexahydro-4-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)-3H-Cyclopropa[4,5]pyrrolo[1,2-a]pyrazin-3-one; (1aS,4S,6aR,7aS)-4-((1r,3R,5R,7S)-3-hydroxyadamantan-1-yl)-6-iminooctahydro-3H-cyclopropa[4,5]pyrrolo[1,2-a]pyrazin-3-one

Smile: O=C(N([C@]1([H])C2)[C@@H]3[C@H]2C3)[C@H]([C@](C[C@H](C4)C5)(C[C@@H]4C6)C[C@]56O)NC1=N