Limnantheoside C (20-Hydroxyecdysone 3-O-4bT-D-glucopyranosyl- [1→3]-β-D-xylopyranoside), a Phytoecdysteroid from Seeds of Limnanthes alba (Limnanthaceae)

Abstract

A new ecdysteroid glycoside, limnantheoside C (20-hydroxyecdysone 3-O-β-D-glucopyranosyl-[→3]-β-D-xylopyranoside [1]), together with limnantheoside A (20-hydroxyecdysone 3- O-β-D-xylopyranoside [2]) and 20-hydroxyecdysone (3) have been isolated by bioassay/RIA- directed HPLC analyses of a methanol extract of the seedmeal of Limnanthes alba Hartw. ex Benth. Lhe structure of the novel ecdysteroid glycoside (1) was determined unambiguously by UV. LSIMS and a combination of ID- and 2D-NMR experiments. These three compounds are isolated from Limnanthes alba for the first time. © 2001, Verlag der Zeitschrift für Naturforschung. All rights reserved.