Using Fc1cccc(F)n1, OCC(F)(F)C(F)(F)C(F)(F)C(F)F to produce Fc1cccc(OCC(F)(F)C(F)(F)C(F)(F)C(F)F)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.