Using COC(=O)c1ccc(CN(CCc2ccccc2OCc2ccc(Br)cc2)C(=O)OC(C)(C)C)cc1 to produce COC(=O)c1ccc(CNCCc2ccccc2OCc2ccc(Br)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.