Using CCCN, O=S(=O)(c1ccc2c(c1)OC(CBr)OC2)C(F)(F)F to produce CCCNCC1OCc2ccc(S(=O)(=O)C(F)(F)F)cc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.