Synonyms: 2-butenoic acid, 2-methyl-, (3β,16α,21β,22α)-22-(acetyloxy)-3-[[O-β-D-glucopyranosyl-(1->2)-O-[β-D-glucopyranosyl-(1->4)]-β-D-glucopyranuronosyl]oxy]-16,24,28-trihydroxyolean-12-en-21-yl ester, (2Z)-;beta-d-Glucopyranosiduronic acid, [3beta,16alpha,21beta(Z),22alpha]-22-(acetyloxy)-16,24,28-trihydroxy-21-[(2-methyl-1-oxo-2-butenyl)oxy]olean-12-en-3-yl O-beta-d-glucopyranosyl-(1->2)-O-[beta-d-glucopyranosyl-(1->4)]-;Escin IB(Aescin IB);Aescin B;