Vanilla beans contain small amounts of coumarin.

香草豆中含有少量的香豆素。

Coumarin is often used in the production of synthetic fragrances.

香豆素常用于合成香料的生产。

The scientist studied the effects of coumarin on human cells.

科学家研究了香豆素对人体细胞的影响。

Some plants naturally produce coumarin as a defense mechanism.

一些植物自然产生香豆素作为防御机制。

The perfume has a hint of coumarin that makes it smell sweet.

这款香水有一丝香豆素的味道，使其闻起来很甜。

So they asked us to make a new coumarin.

于是他们让我们合成香豆素。

Coumarin and flavonids is the main component.

香豆素类与黄酮类为其主要活性成分.

Coumarin and flavonoid is the main component .

香豆素类与黄酮类为其主要活性成分。

And the prediction is it should smell of coumarin.

我们的预测是它闻起来应该和香豆素一样。

They made it...and it smelled exactly like coumarin.

他们成功了，这个物质闻起来的确和香豆素一模一样。