Using CCCN(CCC)C(=O)c1cc(CBr)cc(C(=O)OCC)c1, [C-]#N to produce CCCN(CCC)C(=O)c1cc(CC#N)cc(C(=O)OCC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.