Using OB(O)C1CC1, COC(=O)c1cc(OS(=O)(=O)C(F)(F)F)n(Cc2ccccc2)n1 to produce COC(=O)c1cc(C2CC2)n(Cc2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.