Using CCOC(=O)C(=O)Nc1cc(C(C)C)ccc1CCNC(=O)OC(C)(C)C to produce CCOC(=O)C(=O)Nc1cc(C(C)C)ccc1CCN, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.