Trojanoside H: A cycloartane-type glycoside from the aerial parts of Astragalus trojanus

A novel cycloartane-type glycoside was isolated from the aerial parts of Astragalus trojanus along with the known glycosides astragaloside II, astragaloside IV, astragaloside VII, brachyoside B, brachyoside C and the pterocarpan derivative maackiain. The structure of 1 was determined by spectral methods (1-D and 2-D NMR, and FABMS) and established as 3-O-β-[α- L-arabinopyranosyl(1 → 2)β-D-xylopyranosyl]-6-O-β-D-glucopyranosyl- 20(R),24(S)-epoxy-3β,6α,16β,25-tetrahydroxycycloartane.