Using CCOC(=O)[C@@H]1[C@H]2CC[C@H](C2)[C@@H]1N, O=C1CCCC1 to produce CCOC(=O)[C@@H]1[C@H]2CC[C@H](C2)[C@@H]1NC1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.