Using CCOC(=O)[C@H](O)CNC(=O)c1ccc(CN(C(=O)Nc2cccc(Br)c2)c2ccc(C3CCCCC3)cc2)cc1 to produce O=C(NC[C@@H](O)C(=O)O)c1ccc(CN(C(=O)Nc2cccc(Br)c2)c2ccc(C3CCCCC3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.