Using COC(=O)C1CC(N(C)C(=O)C(F)(F)F)CN1C(=O)OC(C)(C)C to produce CNC1CC(C(=O)OC)N(C(=O)OC(C)(C)C)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.