Ambroxan, also known as ambroxide, is a naturally occurring terpenoid and one of the key constituents responsible for the odor of ambergris. It is an autoxidation product of ambrein and is used in perfumery for creating ambergris notes and as a fixative. Ambroxan is synthesized from sclareol, a component of the essential oil of clary sage. It is also used in small amounts as a flavoring in food. The smell of ambroxan is described as complex, long-lasting, and velvety, with some people finding it salty, smooth, and skin-like. It is often used in accords with musks, animalic notes, and other fragrances.