Using O=S([O-])OO, Cc1ccc2c(c1C)N(CCCN)c1ccccc1S2 to produce Cc1ccc2c(c1C)N(CCCN)c1ccccc1S2(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.