Using O=C(Cl)c1cc(Cl)ncn1, Cc1cccc2sc(=O)[nH]c12 to produce Cc1cc(C(=O)c2cc(Cl)ncn2)cc2sc(=O)[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.