Using O=C1c2c(ccc3c2OCCO3)S(=O)(=O)N1CCCCO, BrC(Br)(Br)Br to produce O=C1c2c(ccc3c2OCCO3)S(=O)(=O)N1CCCCBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.