Using CCOC(=O)c1cnc(-c2cc(F)cc(F)c2)n(CCOC)c1=O to produce COCCn1c(-c2cc(F)cc(F)c2)ncc(C(=O)O)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.