Using COC(=O)C(C)N(c1c(Cl)c(Cl)cc2nc(OC)c(OC)nc12)S(C)(=O)=O to produce CC(C(=O)O)N(c1c(Cl)c(Cl)cc2[nH]c(=O)c(=O)[nH]c12)S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.