Using O=S(=O)(O)O, Cc1cc(N)c2c(C)cn(-c3c(C)cc(Cl)cc3C)c2n1 to produce Cc1cc(O)c2c(C)cn(-c3c(C)cc(Cl)cc3C)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.