Using CCOC(=O)CC(=O)N(Cc1ccc(OC)cc1)CC1(C(=O)OC)CCN(C(=O)OC(C)(C)C)CC1 to produce COC(=O)C1C(=O)N(Cc2ccc(OC)cc2)CC2(CCN(C(=O)OC(C)(C)C)CC2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.