Using C=CCBr, C[C@H]1Oc2ccc(F)cc2NC(=O)[C@H]1NC(=O)OC(C)(C)C to produce C=CCN1C(=O)[C@@H](NC(=O)OC(C)(C)C)[C@@H](C)Oc2ccc(F)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.