Fig. 1: Schematic illustration.
From: Controllable multiple-step configuration transformations in a thermal/photoinduced reaction

The controllable multiple-step configuration transformations of CP1 to CP1-2α by adjusting the reaction temperatures, which require going through four steps and three isomeric intermediates. Color codes: N, blue; F, sky blue; O, red; C, gray. Hydrogen atoms are omitted for clarity. All the configurations and transformations of C = C groups associated with the above reactions are highlighted in orange.