Using C=CCBr, CC(C)(C)OC(=O)[C@H](C1CC1)N1C(=O)CC[C@H](c2cccc(Cl)c2)[C@H]1c1ccc(Cl)cc1 to produce C=CC[C@H]1C[C@H](c2cccc(Cl)c2)[C@@H](c2ccc(Cl)cc2)N([C@H](C(=O)OC(C)(C)C)C2CC2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.