Using O=[N+]([O-])c1ccccc1S(=O)(=O)Nc1cccc2c(Cl)ccnc12, Cl[Sn]Cl to produce Nc1ccccc1S(=O)(=O)Nc1ccc(Cl)c2cccnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.