Using CC(C[C@H]1CN(Cc2ccccc2)CCN1C(=O)OC(C)(C)C)Oc1ccccc1Br to produce CC(C[C@H]1CN(Cc2ccccc2)CCN1)Oc1ccccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.