3-Epiursolic Acid是一种三萜类物质，可以从 Eriobotrya japonica 中分离出来，是竞争性的组织蛋白酶 L (cathepsin L) 抑制剂，IC50 和 Ki 值分别为 6.5 和 19.5 μM，对 cathepsin B 没有明显作用。

3-O-trans-p-Coumaroyltormentic acid, a natural product isolated and purified from the leaves of Eriobotrya japonica calli, induces apoptotic cell death in human leukemia (HL60) via mainly mitochondrial pathway by, at least in part, Topo I inhibition, and may be promising lead compound for developing an effective drug for treatment of leukemia.