Nirmatrelvir Impurity 21

Chemical Name: (1R,2S,5S)-N-((S)-1-cyano-2-((S)-2-oxopyrrolidin-3-yl)ethyl)-6,6-dimethyl-3-((R)-3,3,3-trifluoro-2-(2,2,2-trifluoroacetamido)propanoyl)-3-azabicyclo[3.1.0]hexane-2-carboxamide

Smile: O=C([C@@H]1[C@@]2([H])C(C)(C)[C@@]2([H])CN1C([C@@H](NC(C(F)(F)F)=O)C(F)(F)F)=O)N[C@H](C#N)C[C@H]3C(NCC3)=O