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.
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.
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.
计算结果表明，氟代和氯代磷杂硫烯酮为累积双烯结构，磷杂硫烯酮的异构体含CP三键，所有分子都具有弯曲几何构型。
The results of calculation show that fluophosphathioketene and chlorophasphatioketene presents cumulative double bonds, isomer presents C(P)triple bonds, all of molecules have a trans-bent geometries.
制备R，R（或S，S）构型的格隆铵-立体异构体的方法。
Method for production of the R, R (or S, S) configuration of glycopyrronium stereoisomers.
制备R，R（或S，S）构型的格隆铵-立体异构体的方法。
Method for production of the R, R (or S, S) configuration of glycopyrronium stereoisomers.
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