Using CN(C)C(=O)CC1c2nc(C(F)(F)F)nn2CCN1C(=O)OC(C)(C)C to produce CN(C)C(=O)CC1NCCn2nc(C(F)(F)F)nc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.