Using COC(=O)[C@@H]1C[C@H](OS(=O)(=O)c2ccc(Br)cc2)CN1C(=O)OC(C)(C)C, COc1ccc2nc(Br)c(O)cc2c1 to produce COC(=O)[C@@H]1C[C@@H](Oc2cc3cc(OC)ccc3nc2Br)CN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.