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Now, coumarin is a very common thing, a material, in fragrance which is derived from a bean that comes from South America.
香豆素是香水中一個十分平常的原料，從來自南美的豆子中提煉出來的。
And it is the classic synthetic aroma chemical, OK?
是一種經(jīng)典的合成香料。
It's the molecule that has made men's fragrances smell the way they do since 1881, to be exact.
是男性香水的主要成分，確切地說是自1881年以來的主要成分。
And the problem is it's a carcinogen. So nobody likes particularly to -- you know, aftershave with carcinogens.
問題是香豆素是致癌的。沒有人特別喜歡——含致癌物質(zhì)的須后水。
There are some reckless people, but it's not worth it, OK?
確實有一些人不要命，但是也并不值得這樣做。
So they asked us to make a new coumarin.
于是他們讓我們合成香豆素。
And so we started doing calculations.
我們便開始計算。
And the first thing you do is you calculate the vibrational spectrum of coumarin,
第一件要做的事情就是計算香豆素的震動頻率，
and you smooth it out, so that you have a nice picture of what the sort of chord, so to speak, of coumarin is.
計算完成就順利多了，現(xiàn)在你有一張，可以說是香豆素“和弦”的圖片。
And then you start cranking the computer to find other molecules, related or unrelated, that have the same vibrations.
然后你啟動電腦尋找其他分子，相關(guān)的或者不相關(guān)的都可以，尋找那些有相同震動的。
