Using COC(=O)c1ccc(Sc2ccc(OC)cc2)c(Nc2ncnc3nc(C(C)C)ccc23)c1 to produce COc1ccc(Sc2ccc(C(=O)O)cc2Nc2ncnc3nc(C(C)C)ccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.