介绍了天然物不一定是纯的对映体；

The natural products are not always pure enantiomers.

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因此，获得单一对映体的药物成为一项重要的工作。

Now, the most important thing is to obtain one of the chiral drug enantiomers.

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目的：建立泮托拉唑对映体拆分和对映体光学纯度测定方法。

Objective: to develop a chiral separation method for the enantiomers of pantoprazole.

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不是对映异构体的非对映异构体也属于这一类。

Diastereomers that are not enantiomers also fall into this category.

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不是对映异构体的非对映异构体也属于这一类。

Diastereomers that are not enantiomers also fall into this category.

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