Using Cc1cc2nc(C3CC3)sc2c(Br)c1OS(=O)(=O)C(F)(F)F, CCCCC([Sn])=C(CCCC)CCCC to produce C=Cc1c(C)cc2nc(C3CC3)sc2c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.