soyasapogenol B 22-O-acetate;[(4R,4aR,6aR,6aS,6bR,8aR,9S,10S,12aR,14bS)-10-hydroxy-9-(hydroxymethyl)-2,2,4a,6a,6b,9,12a-heptamethyl-1,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydropicen-4-yl] acetate
To shed light on the structure-activity relationship, various so soyasapogenol B derivatives were synthesized and evaluated for preventive effects on liver injury in the concanavalin A (Con A)-induced hepatitis model in mice, Con A injection into mice induces some pathophysiology of human liver disease such as autoimmune or viral hepatitis, Two hydroxyl groups on the A ring of soyasapogenol B are required for amelioration of liver damage, Modification of the C-22 hydroxyl moiety with an acyloxy or alkyloxy group, or removal of the hydroxyl group. resulted in I greatly enhanced percentage of alleviation. Among the series of soyasapogenol B derivatives examined, six compounds exhibited preventive effects on liver damage. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and hepatoprotective effects of soyasapogenol B derivatives
Derivatives of soyasapogenol B (1), which is the aglycon moiety of soyasaponins from soybean, were synthesized and evaluated for their hepatoprotective effects in vitro. Copyright (C) 1996 Elsevier Science Ltd
Oleanene-Type Triterpene Glycosides from Puerariae Radix. III. Three New Saponins from Pueraria thomsonii.
From the root of Pueraria thomsonii (Leguminosae), three new oleanane-type triterpene glycosides, named kudzusaponin B1, acetyl-kaikasaponin III and acetyl-soyasaponin I were isolated, together with soyasaponin I (4) and subproside V (5). Their structures were determined to be 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-galactopyranosyl-(1-->2) -beta-D-glucuronopyranosyl kudzusapogenol B (1), 3-O-a