同分异构体：亦称异构体。分子式相同但构型不同的两种或两种以上的物质，其差别只在于组成原子的排列不同。

Isomer: one of two or more substances with identical molecular formulas but different configurations, differing only in the arrangement of their component atoms.

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由于在侧链的合成中，有手性碳原子发生了构型翻转，因此我们合成了一个相应的多利培南光学异构体，以利于质量控制。

Due to the configuration inversions of chiral carbon in the synthesis of side chain, we synthesized the corresponding optical isomer of doripenem for quality control.

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确定了互变异构体及过渡态的几何构型、相对能量和活化能。

The geometries, relative energies, and activation energy of the tautomer and transition state were determined.

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