Using O=S([O-])[O-], BrCCCCCCCOc1nc(-c2ccccc2)c(-c2ccccc2)n1-c1ccccc1 to produce O=S(=O)([O-])CCCCCCCOc1nc(-c2ccccc2)c(-c2ccccc2)n1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.