Using COC(=O)c1ccc(F)c(-c2c(F)cc(OC3CCCOC3)cc2F)n1 to produce O=C(O)c1ccc(F)c(-c2c(F)cc(OC3CCCOC3)cc2F)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.