licorice, caramel, and clove, making it a  cherished ingredient for desserts and other  

甘草、焦糖和丁香的味道，使其成為

food products across the globe. However, despite  its culinary appeal, its use in food is banned in  

全球甜點和其他食品的珍貴成分。 然而，儘管它在烹飪上很有吸引力，但在

the United States because of the high levels of  a chemical compound known as coumarin present in  

美國 卻禁止在食品中使用， 因為

the Tonka bean. Coumarin, a naturally occurring  substance, was first isolated from tonka beans in  

零陵香豆中含有高含量的香豆素化合物。香豆素是一種天然存在的物質，於 1820 年首次從零陵香豆中分離出來。

1820. It has a sweet smell, often associated  with newly-mown hay, and has been utilized  

它具有甜味，通常與新割的干草有關，已被用於

in various food and non-food products. During the  1940s, it was widely used as a synthetic additive  

各種食品和非食品產品中。 在 20 世紀 40 年代，它被廣泛用作

in items such as tobacco, cosmetics, and certain  foodstuffs. However, subsequent research indicated  

煙草、化妝品和某些食品等物品中的 合成添加劑 。 然而，隨後的研究表明

that high levels of coumarin could potentially be  toxic, particularly to the liver. These findings,  

，高濃度的香豆素可能具有潛在毒性，特別是對肝臟。這些

primarily based on animal studies, prompted  a re-evaluation of the compound's safety.

主要基於動物研究的發現促使人們重新評估該化合物的安全性。