Using C=CCBr, CC(C)(C)OC(=O)CNC(=O)[C@@H]1C[C@@H](SC(c2ccccc2)(c2ccccc2)c2ccccc2)CN1S(=O)(=O)c1ccc2ccccc2c1 to produce C=CCC(NC(=O)[C@@H]1C[C@@H](SC(c2ccccc2)(c2ccccc2)c2ccccc2)CN1S(=O)(=O)c1ccc2ccccc2c1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.