Using COC(=O)C1=C(OS(=O)(=O)C(F)(F)F)CCC1, C=C[Sn](CCCC)(CCCC)CCCC to produce C=CC1=C(C(=O)OC)CCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.