Coumarin-d₆ is deuterated labeled trans-2-Undecenal (HY-W127505). Trans-2-UndecenalIt is an organic compound belonging to aldehydes. It has a strong, pungent smell and is commonly found in a variety of foods, including fruits and vegetables. Trans-2-UndecenalIt has a variety of applications in the flavor and fragrance industry, especially as a fragrance agent in products such as perfume, cologne and air fresheners. In addition, it can also be used as an intermediate in the synthesis of various chemicals and drugs.