Using CCOC(=O)CC(=O)C(F)(F)F, Nc1ccc(Br)c(Cl)c1 to produce O=c1cc(C(F)(F)F)c2cc(Br)c(Cl)cc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.