Using Cc1cc2ncccc2c(Br)c1OS(=O)(=O)C(F)(F)F, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1c(C)cc2ncccc2c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.