Using C1CCC2=NCCCN2CC1, O=C(O)c1cc(-c2ccc(F)cc2F)ccc1O to produce CCCCOC(=O)c1cc(-c2ccc(F)cc2F)ccc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.