Using NCc1ccc(Cl)cc1, CCOC(=O)c1cnc2c(F)c(F)c(F)c(F)c2c1O to produce O=C(NCc1ccc(Cl)cc1)c1cnc2c(F)c(F)c(F)c(F)c2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.