Using CCCc1c(C(=O)OCC)c(C(F)F)nc(C(F)(F)F)c1C(=O)OCC to produce CCCc1c(C(=O)O)c(C(F)F)nc(C(F)(F)F)c1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.