Using O=C([O-])[O-], Clc1ccc2ncc3ncn(-c4ccccc4Cl)c3c2c1 to produce [O-][n+]1cc2ncn(-c3ccccc3Cl)c2c2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.