Using N#CCCCBr, COC(=O)c1cc(OCc2cccc(Cl)c2)ccc1O to produce COC(=O)c1cc(OCc2cccc(Cl)c2)ccc1OCCCC#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.