Using COCc1nnc(-c2cccnc2)n1-c1c(Cl)c(Cl)cc2nc(OC)c(OC)nc12 to produce COCc1nnc(-c2cccnc2)n1-c1c(Cl)c(Cl)cc2[nH]c(=O)c(=O)[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.