Using COC(O)C(F)(F)F, Cc1[nH]ccc(=O)c1OCc1ccccc1 to produce Cc1[nH]cc(C(O)C(F)(F)F)c(=O)c1OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.