Showing papers in "Planta Medica in 1968"

Crystallographic, optical and chromatographic studies of judaicin, bitter principle of Artemisia judaica l.

Abstract: The crystallographic characterization of judaicin have revealed that its crystals are of the monoclinic system, normal class with eight faces and sometimes twinned. The optical characterization have shown that its crystals are anisotropic, biaxial, positive with small optic axial angle, 2V = 10°; its refractive indices were found to be ny = 1.609, nB = 1.547 and na = 1.546. The birefringence = 0.063; the extinction angle Z/C = – 3°. Judaicin has been characterized chromatographically and its Rf values were determined using paper and thin layer chromatography. A colour test has been devised by which it was possible to detect judaicin in a drop of 1 : 1000 solution. Die kristallographische Analyse von Judaicin hat ergeben, das es sich um monokline, anisotrope Kristalle mit den Brechungsindices ny = 1,609, nB = 1,547 und nrx = 1,546 handelte. Judaicin wurde papier– und dunnschichtchromatographisch charakterisiert. Ein Farbtest ergab, das es moglich ist, Judaicin in einer Verdunnung 1 : 1000 nachzuweisen.

Über weitere c3–substituierte cumarin–derivate aus ruta graveolens: daphnoretin und daphnoretin–methyläther1

Abstract: Die aus den oberirdischen Teilen von Ruta graveolens isolierten Substanzen Rn und R3 konnten durch die UV–, IR–, KMR– und Massenspektren als Daphnoretin und Daphnoretin–methylather identifiziert werden.

Phytochemical investigation of Raunculus scleratus L.

Abstract: The investigation established the constants of Ranunculus sceleratus L. grown in Egypt, and revealed the nature of its main constituents by applying paper, T.L.C., and column Chromatographie techniques. The plants were found to contain the glycoside ranunculin, its aglycone protoanemonin and its dimeric form, anemonin. The plant contains also the base choline, an unidentified alkaloid, as well as unsaturated sterols, pyrogallol tannins and flavonoid compounds. Anemonin and protoanemonin were sucessfully separated from each other chromatographically after converting them into their complexes with 2:4 dinitro phenyl hydrazine. In Ranunculus sceleratus wurden das Glykosid Ranunculin, dessen Aglykon Protoanemonin bzw. das dimere Anemonin nachgewiesen. Ferner wurden Cholin, ein unidentifiziertes Alkaloid, ungesattigte Sterole, Pyrogallol, Tannine und Flavonoide gefunden.