Using Cc1cc2[nH]c3cc(Cl)ncc3c(=O)n2n1, O=C([O-])[O-] to produce Cc1cc2n(C)c3cc(Cl)ncc3c(=O)n2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.