Using C=CCBr, O=C(CC1CCCCC1)N1C(=O)OCC1Cc1ccccc1 to produce C=CCC(C(=O)N1C(=O)OCC1Cc1ccccc1)C1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.