Using COC(=O)CCc1ccc(Oc2ccc(CC(NC(=O)OC(C)(C)C)C(=O)O)cc2)cc1, CCN(CC)CC to produce COC(=O)CCc1ccc(Oc2ccc(CC(NC(=O)OC(C)(C)C)C(=O)N(C)C)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.