Coumarin

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** O hydroxycinnamic acid. Pleasant smelling compound found in many plants and released on wilting. Has anticoagulant activity by competing with Vitamin K.

**Synonyms:** - 1,2-Benzopyrone - 2H-1-Benzopyran-2-one - 2H-1-Benzopyran-2-one - 2H-1-Benzopyran-2-one - COUMARIN - COUMARIN - Chromen-2-one - Tonka Bean Camphor - Tonka bean camphor - coumarin