kumarins
Kumarins, more commonly known in English as coumarins, are a large class of aromatic organic compounds based on the benzopyranone skeleton. The core structure is a benzene ring fused to a lactone (1,2-benzopyran-2-one), and many derivatives are formed by substitutions or by additional ring fusions, such as furanocoumarins or pyranocoumarins. Simple coumarin serves as the parent compound, while numerous natural products and pharmacologically active derivatives arise from it.
Natural occurrence and biosynthesis: Coumarins are widespread in the plant kingdom, especially in Apiaceae (the carrot
Diversity and properties: The family includes a spectrum from simple, lightly substituted coumarins to complex fused
Uses and safety: Historically used in perfumes and as flavor agents, with tonka bean coumarin once common