Using Cl, COC(=O)c1sc(N)nc1-c1nccc(N2CCCCC2)n1 to produce COC(=O)c1sc(Cl)nc1-c1nccc(N2CCCCC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.