Using Nc1nc(-c2ncccc2C(F)(F)F)ccc1C(=O)ON1C(=O)CCC1=O, COCC(=O)CC(=O)OC to produce COCc1nc2nc(-c3ncccc3C(F)(F)F)ccc2c(O)c1C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.