An iridoid glucoside from Dipsacus asperoides

Abstract A new iridoid glucoside, loganic acid -6′-O-β- d -glucoside , has been isolated from the defatted root of Dipsacus asperoides . Its structure has been elucidated by spectroscopic means as 1S-(1 α,4aα,6α,7 α,7aα)-1-{(6-O-β- d -glucopyranosyl-β- d -glucopyranosyl)oxy}-1,4a,5,6,7,7a-hexahydro-6-hydroxy-7-methyl- cyclopenta {c} pyran-4-carboxylic acid.