11. The bark and especially the fruit yield pyrogallol and catechol to dye and tan leather. 12. This organism's cells are about 2 x 4 water-soluble catechol melanin. 13. The catechol estrogens are endogenous metabolites of estradiol and estrone and include the following compounds: 14. The activity of tyrosinase is similar to catechol oxidase, a related class of copper oxidase. 15. Polyphenol oxidases are a family of di-copper metalloenzymes that include tyrosinase and catechol oxidase. 16. The key role of catechol oxidase in enzymatic browning makes it a common target for inhibition. 17. When the pharmacophore of salicylic acid and catechol were merged, new chemical scaffolds were created. 18. Catechol has since been shown to occur in free-form naturally in kino and in beechwood tar.19. In many polyphenols, the catechol group acts as electron acceptor and is therefore responsible for the antioxidant activity. 20. Smoke deposits a number of pyrolysis products onto the food, including the phenols syringol, guaiacol and catechol .
