title: [Studies on heterocyclic compounds. XX. Preparation of 1,2-Di-hydro-2-oxo-3-phenylcinchoninic acids (author's transl)].
mesh_terms: D002929:Cinchona / Q000138:chemical synthesis*; D009596:Nitrophenols / Q000138:chemical synthesis; D010946:Plants, Medicinal; D013057:Spectrum Analysis
chemical_list: D009596:Nitrophenols