Using O=[N+]([O-])[O-], CC1c2c(Cl)cccc2NS1(=O)=O to produce CC1c2c(Cl)ccc([N+](=O)[O-])c2NS1(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.