Using C=C1N(c2ccc(C(=O)OC)cc2)C(=O)C(=O)N1c1ccc(C(=O)OC)cc1 to produce COC(=O)c1ccc(N2C(=O)C(=O)N(c3ccc(C(=O)OC)cc3)C2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.