Using CC(C)CC(Nc1ccc(-c2ccc(C(C)(C)C)cc2)cc1)c1ccc(C(=O)O)cc1, COC(=O)CCN to produce COC(=O)CCNC(=O)c1ccc(C(CC(C)C)Nc2ccc(-c3ccc(C(C)(C)C)cc3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.