Using O=S(=O)(c1ccccc1)n1c(-c2cccc3ccccc23)cc2c(Cl)ncnc21 to produce Clc1ncnc2[nH]c(-c3cccc4ccccc34)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.