Nirmatrelvir Impurity 18

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

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