Using CCOC(=O)CBr, ON=C(c1ccc(Cl)cc1)c1ccc(Cl)cc1 to produce CCOC(=O)CON=C(c1ccc(Cl)cc1)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.