Using CI, Fc1ccc(-c2nnc(S)nc2-c2ccc(F)cc2)cc1 to produce CSc1nnc(-c2ccc(F)cc2)c(-c2ccc(F)cc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.