Using CI, O=C(NC1N=C(c2ccccc2)c2ccccc2NC1=O)OCc1ccccc1 to produce CN1C(=O)C(NC(=O)OCc2ccccc2)N=C(c2ccccc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.