Using CC(C)(C)OC(=O)N1CCO[C@@H]2CN(C(=O)C(F)(F)F)CC[C@H]21 to produce CC(C)(C)OC(=O)N1CCOC2CNCCC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.