Using COc1cc2c(cc1OC)C(C)Cn1c-2cc(Nc2c(C)cc(C)cc2C)nc1=O, O=C([O-])[O-] to produce COc1cc2c(cc1OC)C(C)Cn1c-2cc(=Nc2c(C)cc(C)cc2C)n(C)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.