Justiciosides E–G, triterpenoidal glycosides with an unusual skeleton from Justicia betonica

Abstract Three new triterpenoidal glucosides, justiciosides E, F and G, were isolated from the aerial portion of Justicia betonica . Their structures were established through chemical and spectroscopic analyses, and showed an unusual A-nor-B-homo oleanan-12-ene skeleton type for the aglycone moiety as A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28- O -β- d -glucopyranosyl-(1→2)-β- d -glucopyranoside, A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28- O -β- d -glucopyranosyl-(1→2)-β- d -glucopyranosyl-(1→2)-β- d -glucopyranoside, and 11α-methoxy-A-nor-B-homo-oleanan-10,12-diene-3β,11α,28-triol 28- O -β- d -glucopyranosyl-(1→2)-β- d -glucopyranosyl-(1→2)-β- d -glucopyranoside, respectively.