Using OB(O)c1ccc(F)nc1, Nc1ncc(-c2nn3c(I)cnc3s2)cc1C(F)(F)F to produce Nc1ncc(-c2nn3c(-c4ccc(F)nc4)cnc3s2)cc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.