Using CCOC(=O)C1(CCCNc2ccc(Br)cc2C)CCN(C(=O)OC(C)(C)C)CC1 to produce Cc1cc(Br)ccc1N1CCCC2(CCN(C(=O)OC(C)(C)C)CC2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.