Using COC(=O)c1cc2[nH]c(-c3ccc(Cl)cc3)c(C3=CCCCC3)c2s1 to produce COC(=O)c1cc2[nH]c(-c3ccc(Cl)cc3)c(C3CCCCC3)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.