Using CCOC(=O)Cc1cc(Cl)c(Nc2nc3cc(F)ccc3s2)cc1F to produce O=C(O)Cc1cc(Cl)c(Nc2nc3cc(F)ccc3s2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.