Using COC(=O)C1CCN(c2nc3ccc(OC)cc3cc2C(F)(F)F)CC1 to produce O=C(O)C1CCN(c2nc3ccc(O)cc3cc2C(F)(F)F)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.