Using CCOC(=O)C1(CCNc2ccc(Br)nc2C)CCN(C(=O)OC(C)(C)C)CC1 to produce Cc1nc(Br)ccc1N1CCC2(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.