Using CCOC(=O)c1cn2c3c(c(F)c(F)cc3c1=O)OCC21CC1 to produce O=C(O)c1cn2c3c(c(F)c(F)cc3c1=O)OCC21CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.