11. The chemical structure of furanocoumarins consists of a furan ring fused with coumarin . 12. The bark, wood, and seeds contain coumarin . 13. Coniferyl alcohol is an intermediate in biosynthesis of eugenol and of stilbenoids and coumarin . 14. All the species reportedly contain the compound coumarin , used medicinally in many countries. 15. It is the standard coumarin used in Germany. 16. The bark contains : tannic substances, coumarin , bitter substances, and alkaloids. 17. Coumarin is a chemical fixative used in the preparation of detergents, cosmetics and perfumes.18. The tanning activator coumarin is known to induce thymine dimers ( cyclobutane pyrimidine dimers ). 19. The coumarin scopoletin is present in whisky, with the highest level reported in Bourbon whiskey. 20. Other historically common fluorophores are derivatives of rhodamine ( TRITC ), coumarin , and cyanine.
