Using CCCCN, CC(C)(C)OC(=O)C[C@H]1C[C@@H](CO)OC(C)(C)O1 to produce CCCCNC(=O)C[C@H]1C[C@@H](CO)OC(C)(C)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.