Using CCN(CC)c1ccc(NC(=O)C2(C(=O)OC(C)(C)C)CCc3ccccc3C2)cc1 to produce CCN(CC)c1ccc(NC(=O)C2(C(=O)O)CCc3ccccc3C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.