Using O=S(=O)(O)O, COc1c(C)cnc(CSc2nc3ncc(N)cc3[nH]2)c1C to produce COc1c(C)cnc(CSc2nc3ncc(O)cc3[nH]2)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.