Using C=CCBr, CCOc1ccc(O)c2c1C(=O)N(Cc1ccccc1)S2(=O)=O to produce C=CCOc1ccc(OCC)c2c1S(=O)(=O)N(Cc1ccccc1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.