alpha-D-glucopyranosiduronic acid, (3 beta,20 beta)-20-carboxy-11-oxo-30-norolean-12-en-3-yl 2-O-beta-D-glucopyranuronosyl-
(3beta,20beta)-20-carboxy-11-oxo-30-norolean-12-en-3-yl-2-O-beta-D-glucopyranuronosyl-alpha-D-glucopyranosiduronic acid