Using CCOC(=O)C(C(=O)OCC)c1ccccc1, NC(=O)NCc1ccccc1 to produce O=C1NC(=O)N(Cc2ccccc2)C(=O)C1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.