Using C[C@H]1CCCN1[C@H]1CCN(c2ccc(C(=O)OC(C)(C)C)cc2)C1 to produce C[C@H]1CCCN1[C@H]1CCN(c2ccc(C(=O)O)cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.