noun
stereoisomer
Technical term in chemistry for isomers with the same molecular formula and sequence of bonded atoms, but differing in the three-dimensional orientations of their atoms in space.
この化合物には複数の立体異性体が存在する。
This compound has multiple stereoisomers.
異性体 is a broader term for isomers in general, while 立体異性体 specifically refers to stereoisomers, a subtype where atoms are connected in the same order but differ in spatial arrangement.
Compound of 立体 (りったい, 'three-dimensional') and 異性体 (いせいたい, 'isomer'), reflecting the spatial aspect of this type of isomerism.