4-Biphenylcarboxylic acid is a useful organic compound for research related to life sciences.

Chebulic acid, a phenolcarboxylic acid compound isolated from Terminalia chebula, has potent anti-oxidant activity, which breaks the cross-links of proteins induced by advanced glycation end-products (AGEs) and inhibits the formation of AGEs.

Isoliensinine, a natural phenolic bisbenzyltetrahydroisoquinoline alkaloid, has received considerable attention for its potential biological effects such as antioxidant and anti-HIV activities.