Using CC(=N)N, CCOC(=O)CCC(C(=O)OCC)C(=O)C(F)(F)F to produce CCOC(=O)CCc1c(C(F)(F)F)nc(C)[nH]c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.