Using C=CCBr, O[C@@H]1C[C@H](CN2CCC(c3ccccc3)CC2)CCc2ccccc21 to produce C=CCO[C@@H]1C[C@H](CN2CCC(c3ccccc3)CC2)CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.