Using CCCS(=O)(=O)Cl, Nc1ncc2cc(-c3c(Cl)cccc3Cl)c(N)nc2n1 to produce CCCS(=O)(=O)Nc1nc2nc(N)ncc2cc1-c1c(Cl)cccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.