Using CCC=O, COc1ccc(CC(C)NCC2CCN(C(=O)OC(C)(C)C)CC2)cc1 to produce CCCN(CC1CCN(C(=O)OC(C)(C)C)CC1)C(C)Cc1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.