Using CCOC(=O)[C@@H](OC(C)(C)C)c1c(CBr)c(CBr)c2ccccc2c1OS(=O)(=O)C(F)(F)F, CCN(CC)CC to produce CCOC(=O)[C@@H](OC(C)(C)C)c1c2c(c3ccccc3c1OS(=O)(=O)C(F)(F)F)CN(C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.