Using CCOC(=O)CN1C(=O)c2ccc(N)cc2C1=O, O=C(c1ccccc1)c1ccccc1 to produce CCOC(=O)CN1C(=O)c2ccc(N=C(c3ccccc3)c3ccccc3)cc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.