A pentacyclic triterpene with diverse biological activities; decreases LPS-induced increases in the secreted levels of nitrite, PGE2, TNF-α, IL-1β, and IL-6 from RAW 264.7 cells at 5 and 12.5 UG/ml; reduces the levels of HBsAg, HBeAg, and HBV DNA secreted from HBV-infected HepG2 2.2.15 cells in a concentration-dependent manner; prevents increases in liver damage, hepatocyte apoptosis, serum levels of ALT and AST, and hepatic levels of MDA, as well as decreases in hepatic levels of GSH, SOD, and Bax in a mouse model of concanavalin A-induced liver injury at 10 mg/kg per day