Using CC(=O)/C=C/CCOC1(C)CCN(C(=O)OC(C)(C)C)CC1 to produce CC(=O)CCCCOC1(C)CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.