Using CNC=O, COC(=O)c1cn(-c2cc3c(=O)n(NS(C)(=O)=O)c(=O)[nH]c3cc2C(F)(F)F)cn1 to produce CNC(=O)c1cn(-c2cc3c(=O)n(NS(C)(=O)=O)c(=O)[nH]c3cc2C(F)(F)F)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.