Using C=C(C)CC(O)(CCN(C(=O)OC)C1(c2ccc(Br)cc2)CC1)c1ccccc1 to produce C=C(C)CC1(c2ccccc2)CCN(C2(c3ccc(Br)cc3)CC2)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.