Using COc1ccc(CBr)cc1, O=C(O)c1cc(-c2ccc(F)cc2F)ccc1O to produce COc1ccc(COC(=O)c2cc(-c3ccc(F)cc3F)ccc2O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.