Using CC(C)NCCNC(=O)OC(C)(C)C, O=C1Nc2cc(Cl)ccc2C1(Br)Cc1cccc(Cl)c1 to produce CC(C)N(CCNC(=O)OC(C)(C)C)C1(Cc2cccc(Cl)c2)C(=O)Nc2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.