Using O=C([O-])[O-], CC1(C)C(=O)N=C2C1=C(O)C(=O)c1ccccc12 to produce COC1=C2C(=NC(=O)C2(C)C)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.