Fig. 10
From: Development of an open-source software for isomer enumeration
Illustration of para stereocenters. Top: The true stereocenters are marked with a yellow dot and the potential para stereocenters are marked with a pink dot. The hydrogen atoms are not shown explicitly. The two outer potential para stereocenters lie in the middle between the two symmetrical true stereocenters on the left and right, respectively. The inner potential para stereocenter lies in the middle of the two outer potential para stereocenters, as well as of the four combinations of true stereocenters on the two opposite sides of the molecule. Bottom: Illustration of the shortest path and ring criteria for detecting potential para stereocenters