Using Nc1ccc(OCc2ccccc2)c(F)c1, O=C(O)c1cnccn1 to produce O=C(Nc1ccc(OCc2ccccc2)c(F)c1)c1cnccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.