Using Cc1ccc(C2CN(C)C(=O)C23CCCN(C(=O)OC(C)(C)C)C3)cc1 to produce Cc1ccc(C2CN(C)C(=O)C23CCCNC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.