Nirmatrelvir Impurity 4

Chemical Name: (2S,3S)-3-(2-Chloropropan-2-yl)-N-((S)-1-cyano-2-((S)-2-oxopyrrolidin-3-yl)ethyl)-1-((S)-3,3-dimethyl-2-(2,2,2-trifluoroacetamido)butanoyl)pyrrolidine-2-carboxamide

Smile: O=C([C@H]1N(C([C@@H](NC(C(F)(F)F)=O)C(C)(C)C)=O)CC[C@@H]1C(C)(Cl)C)N[C@H](C#N)C[C@H]2C(NCC2)=O