Gallic acid biological activities

The remaining shlklmates in Table III also are relatively simple, well known compounds. The phenolic structures of vanillin (125) and gallic acid (127) and the prephenolic structures of the common quinic acid (128) and chlorogenic acid (129) make them candidates for physiological activity. Gallic acid is the monomer for tannins, biological polymers found in the cotton plant (15, 37). 

Although the biological activity of brevifolin as an insect growth inhibitor is unknown, gallic acid exhibited some growth-inhibitory activity against virescens larvae (EC50 = 7.40 mmol/kg diet)... 

Cirillo G, Kraemer K, Fuessel S, Puoci F, Curcio M, Spizzirri UG, Altimari I, lemma F (2010). The biological activity of a gallic acid-gelatin conjugate. Biomacromoiecuies, 11,3309-3315. 

The banana plant is the source of several biologically active substances. Dopamine, norepinephrine, serotonin, and an antiulcerogenic factor have been detected in the pulp and skin of the fruit (Waalkes etal, 1958 West, 1958 Best a/., 1984). Acetic acid, gallic acid, tannin, sodium chloride, and salts of aluminum, calcium, and potassium have been associated with the juice of the plant stem (Herbert, 1896 Wehmer, 1929 Watt and Breyer-Brandwijk, 1962). Recently, the presence of dopamine, norepinephrine, and monopotassium oxalate (Benitez et al, 1991) and potassium nitrate and sodium nitrate (Singh et al, 1993) has been reported in extracts of the stem juice. 

---