Using CCCBr, N#CC1(NC(=O)[C@@H]2CCCC[C@H]2C(=O)N2CCc3[nH]c4c(O)cccc4c3C2)CC1 to produce CCCOc1cccc2c3c([nH]c12)CCN(C(=O)[C@@H]1CCCC[C@H]1C(=O)NC1(C#N)CC1)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.