IPA: //ˌdaɪəˈstɪrəmər//
KK: /daɪəˈstɪrəmər/
A type of stereoisomer that has two or more chiral centers and is not a mirror image of another isomer of the same compound.
The two compounds are diastereomers, meaning they have different spatial arrangements but are not mirror images of each other.
Diastereomer → It is formed from "dia-" (meaning through or across) and "stereos" (meaning solid or three-dimensional) and "meros" (meaning part). The term refers to stereoisomers that are not mirror images of each other, indicating a difference in spatial arrangement across a structure.
Think of 'across' ('dia-') and 'three-dimensional parts' ('stereos' and 'meros') to remember that a diastereomer is a type of stereoisomer that differs in spatial arrangement.