Verbascosid und Isoverbascosid aus Paulownia tomentosa Steud. / Verbascoside and Isoverbascoside from Paulownia Tomentosa Steud

Abstract

The structure of verbascoside and isoverbascoside, isolated from the leaves of Paulownia tomentosa Steud. have been determined by NMR spectroscopy and partially hydrolysis to be β-(3.4-dihydroxyphenyl)ethyl-O-a-1-rhamnosyl(1→3)-β-D-(4-0-caffeoyl)-glucopyranoside (1) and β-(3.4-dihydroxypehenyl)ethyl-O-a-L-rhamnosyl(1→3)-β-D-(6-O-caffeoyl)- glucopyranoside (2)