diastereomeric form

例句：

1. 1.The two molecules have the same chemical formula but different diastereomers.
   这两个分子的化学式相同，但有不同的对位异构体。
2. 2. The crystals were found to be diastereomers of a common compound.
   这些晶体被发现是某种常见化合物的对位异构体。
3. 3.The study focused on the diastereomers of the drug, which could affect its efficacy.
   该研究专注于药物的对位异构体，这可能影响其效力。