Using O=C1CCCC1, CC(C)(C)OC(=O)N[C@@H]1COCC[C@H]1N to produce CC(C)(C)OC(=O)N[C@@H]1COCC[C@H]1NC1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.