Using CC(C)(C)OC(=O)N1CCC(=O)C(C)(C)C1, COc1cc(Br)ccc1Cl to produce COc1cc(C2(O)CCN(C(=O)OC(C)(C)C)CC2(C)C)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.