Synonyms: (3β,16α,21β,22α)-28-Acetoxy-16,22,24-trihydroxy-21-{[(2Z)-2-methylbut-2-enoyl]oxy}olean-12-en-3-yl β-D-glucopyranosyl-(1->2)-[β-D-glucopyranosyl-(1->4)]-β-D-glucopyranosiduronic acid;2-butenoic acid, 2-methyl-, (3β,16α,21β,22α)-28-(acetyloxy)-3-[[O-β-D-glucopyranosyl-(1->2)-O-[β-D-glucopyranosyl-(1->4)]-β-D-glucopyranuronosyl]oxy]-16,22,24-trihydroxyolean-12-en-21-yl ester, (2Z)-;(3β,16α,21β,22α)-28-(acetyloxy)-16,22,24-trihydroxy-21-{[(2Z)-2-methylbut-2-enoyl]oxy}olean-12-en-3-yl β-D-glucopyranosyl-(1->2)-[β-D-glucopyranosyl-(1->4)]-β-D-glucopyranosiduronic acid