Isofraxidin has definite anti-bacterial, anti-oxidant, analgesic,and anti-inflammatory activities, it inhibits expression of MMP-7 and in vitro cell invasion at a non-toxic level through inhibiting ERK1/2 phosphorylation in hepatoma cell lines.Isofraxidin is one possible radio-protector, it can protect leukemia cells from radiation-induced apoptosis via ROS/mitochondria pathway in a p53-independent manner.

Procyanidin B3(B3) is a procyanidin dimer that is widely studied due to its high abundance in the human diet and antioxidant activity. Procyanidin B3 is an inhibitor of histone acetyltransferase, B3 enhances the action of antagonist for prostate cancer cells via inhibition of p300-dependent acetylation of androgen receptor. Procyanidin B3 prevents osteoarthritis (OA) progression and heterotopic cartilage formation, at least in a part through the suppression of iNOS, these results support the potential therapeutic benefits of B3 for treatment of human OA and heterotopic ossification. Procyanidin B3 is a proanthocyanidin consisting of two molecules of (+)-catechin joined by a bond between positions 4 and 8' in alpha-configuration. It can be found in red wine, in barley, in beer, in peach or in Jatropha macrantha, the Huanarpo Macho. It has a role as an antioxidant, a metabolite, an anti-inflammatory agent and an EC 2.3.1.48 (histone acetyltransferase) inhibitor. It is a polyphenol, a proanthocyanidin, a biflavonoid and a hydroxyflavan.