Using BrCc1ccccc1, COC1C(OC(=O)N2CCOCC2)CCC2(CO2)C1C1(C)OC1CCO to produce COC1C(OC(=O)N2CCOCC2)CCC2(CO2)C1C1(C)OC1CCOCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.