3-Epiursolic Acid 是一种三萜类物质，分离自桃金娘科植物，是组织蛋白酶 L 的竞争性抑制剂（IC50=6.5 μM，Ki=19.5 μM），对 cathepsin B 无明显作用。

6,19-Dihydroxyurs-12-en-3-oxo-28-oic acid 是一种天然产物，可用于生命科学领域的相关研究。其产品编号为 TN3143，CAS号为 194027-11-7。

Hyptadienic acid exhibits moderate cytotoxicity against HepG2 cells.It also shows a marked anti-inflammatory effect, it also exhibits strong antitumor-promoting activity in an in vivo two-stage carcinogenesis test of mouse tumor by using 7,12-dimethylbenz

3-O-(E)-p-coumaroyl tormentic acid may be promising lead compound for developing an effective drug for treatment of leukemia, it induces apoptotic cell death in human leukemia (HL60) via mainly mitochondrial pathway by, at least in part, Topo I inhibition. 3-O-trans-p-coumaroyltormentic acid shows cytotoxicity against four human tumor cell lines (A549, SK-OV-3, SK-MEL-2, and HCT-15) in vitro, the IC50 values of 13.72, 14.29,14.61, 14.04 uM, respectively. 3beta-O-cis-p-Coumaroyltormentic acid, and 3beta-O-trans-p-coumaroyltormentic acid are weakly selective for vancomycin-resistant Enterococcus (VRE) compared with eukaryotic cells, with an MIC of 59.4microg/mL and a 50% inhibitory concentration (IC50) of 72.0microg/mL for monkey kidney epithelial (MA104) cells. A mixture of 3-O-cis-p-coumaroyltormentic acid and 3-O-trans-p-coumaroyltormentic acid shows an inhibitory effect comparable to (-)-epigallocatechin gallate (EGCG) of green tea on the activation of Epstein-Barr virus early antigen (EBV-EA) induced by 12-O-tetradeca--noylphorbol-13-acetate (TPA).

2alpha,19alpha-Dihydroxy-3-oxo-urs-12-en-28-oic acid has anti-HIV activity. It shows an inhibitory effect on the activation of Epstein-Barr virus early antigen (EBV-EA) induced by 12-O-tetradecanoylphorbol-13-acetate (TPA) and causes a significant delay o