Using CCO, O=C(O)C(Br)CCCCCCCN1C(=O)c2ccccc2C1=O to produce CCOC(=O)C(Br)CCCCCCCN1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.