It's basically two benzene rings stuck together.

它基两个苯环粘在一起。

Consider this molecule, a hexane with a benzene ring attached to carbon number 2.

考虑这个分子， 一个苯环连接到碳数 2 的己烷。

Plus, aldehydes usually have strong smells, and vanillin also contains a ring of six carbon atoms, known as a benzene ring, that tends to make chemicals even smellier.

此外，醛通常有强烈的气味，而香草醛还含有一个由六个碳原子组成的环， 称为苯环，这往往会使质更臭。

And scientists already knew how to make it -- one way involved combining methyl alcohol and anthranilic acid, a type of acid with one of those smelly benzene rings.

科家们已经知道如何制造它——一种方法将甲醇和邻氨基苯甲酸结合，邻氨基苯甲酸一种带有臭味苯环的酸。