Using CCCC[Sn](CCCC)(CCCC)c1cncn1C, CNc1nc(Nc2ccc(Br)cc2OC)ncc1C(F)(F)F to produce CNc1nc(Nc2ccc(-c3cncn3C)cc2OC)ncc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.