Using COC(=O)c1ccc(CN2CCCN(Cc3ccc(OCC(F)(F)C(F)(F)F)cc3)CC2)cc1 to produce O=C(O)c1ccc(CN2CCCN(Cc3ccc(OCC(F)(F)C(F)(F)F)cc3)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.