Using O=C([O-])[O-], Cc1nc(C(C)C)c(Cc2cc(Cl)cc(Cl)c2)[nH]1 to produce Cc1nc(C(C)C)c(Cc2cc(Cl)cc(Cl)c2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.