Using CCOC(=O)c1ccc(NC(=O)Cc2cc(Br)ccc2OCc2ccccc2)cc1 to produce CCOC(=O)c1ccc(NCCc2cc(Br)ccc2OCc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.