STRUCTURE OF CYCLOQUIVINOSIDE A FROM THE AERIAL PART OF Astragalus chivensis

摘要

The new cycloartane glycoside cycloquivinoside A, 24S-25-methoxycycloartan-3β,6α,16β,24,25-pentaol 3-O-β-D-glucopyranoside, was isolated from the aerial part of Astragalus chivensis Bunge (Leguminosae). The structure was established based on chemical transformations and 2D spectra (TOCSY, ROESY, HMBC, HSQC, COSY).