Notizen: Abbau des 2′.4.4′.6′-Tetrahydroxychalkon-2′-β-ᴅ-glucosid durch Callussuspensionskulturen von Pisum sativum L. / Degradation of 2′,4,4′,6′-Tetrahydroxychalcone-2′-β-ᴅ-glucoside by Callus Suspension Cultures of Pisum sativum L.