Using O=C(O)c1cc(O)cc2cc(-c3ccc(O)cc3)oc12, CNOC to produce CON(C)C(=O)c1cc(O)cc2cc(-c3ccc(O)cc3)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.