An iridoid glucoside from dipsacus asperoides

A new iridoid glucoside, loganic acid-6'-O-beta-D-glucoside, has been isolated from the defatted root of Dipsacus asperoides. Its structure has been elucidated by spectroscopic means as 1S-(1 alpha,4a alpha,6 alpha,7 alpha,7a alpha)-1-[(6-O-beta-D- glucopyranosyl-beta-D-glucopyranosyl)oxyl]1,4a,5,6,7,7a-hexahydro-6-hydr oxy-7- methyl-cyclopenta[c]pyran-4-carboxylic acid.