isostere

例句：

1. 1. The two compounds are isomeric and have the same molecular formula but different structures.
   这两种化合物是同源的，具有相同的分子式但结构不同。
2. 2.Isosteres are often used in pharmaceutical research to study the effects of drugs on the body.
   同源物在药物研究中常被用来研究药物对身体的影响。
3. 3.The discovery of isosteres has led to new insights into the mechanisms of chemical reactions.
   发现同源物有助于我们深入了解化学反应的机制。