Coumarin are antimicrobial, antiviral, antinflammatory, lowers blood sugar and antioxidant.  Coumarin is often said to be a blood thinner.  Common food containing coumarin are  strawberries, apricots, cherries, and cinnamon. More…

Merriam-Webster Online Dictionary
coumarin (noun)
a toxic white crystalline lactone CHO with an odor of new-mown hay found in plants or made synthetically and used especially in perfumery and as a parent compound in anticoagulant agents - 9 6 2 , also a derivative of this compound