Triterpene glycosides ofClimacoptera transoxana. IV. Structures of copterosides G and H

From the epigeal part of the plantClimacoptera transoxana (Iljin) Botsch. have been isolated new triterpene glycosides — copterosides G and H, which are bisdesmosidic glycosides. On the basis of chemical transformations and spectral characteristics, copteroside G has been assigned the structure of gypsogenic acid 28-O--D-glucopyranoside 3-O--D-glucuronopyranoside, while copteroside H is gypsogenic acid 28-O--D-glucopyranoside 3-O-O--D-xylopyranosyl-(1 2)--glucuronopyranoside].Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 60–64, January–February, 1984.