Using Clc1ncccn1, Nc1ncc(-c2ccc(-c3ccccc3S)cc2F)cn1 to produce Nc1ncc(-c2ccc(-c3ccccc3Sc3ncccn3)cc2F)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.