Using Cn1c(=O)c2c(ncn2CC(=O)O)n(C)c1=O, NCCCC(F)(F)F to produce Cn1c(=O)c2c(ncn2CC(=O)NCCCC(F)(F)F)n(C)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.