Fig. 3
From: Development of an open-source software for isomer enumeration
Illustration of the different types of stereocenters. Top: Tetrahedral stereocenters (purple) are bonded to four different substituents, and cis/trans stereocenters (orange) consist of two cis/trans half-stereocents which are bonded by a double bond, and each connected to two different substituents by single bonds. Bottom: Distinction between true (yellow) and para (pink) stereocenters. For a true stereocenter, the substituents differ in their constitution, whereas for a para stereocenter, the substituents only differ in their stereochemistries