Using CC(C)(C)OC(=O)N1CCC2(CC1)CNC(=O)C2, COC(=O)c1ccc(CBr)cc1 to produce COC(=O)c1ccc(CN2CC3(CCN(C(=O)OC(C)(C)C)CC3)CC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.