Using CC1(C)OC(=O)CC(=O)O1, O=C(O)Cc1cc(F)c(F)cc1F to produce CC1(C)OC(=O)C(C(=O)Cc2cc(F)c(F)cc2F)C(=O)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.