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