Keywords: 12-Crown-4-3D-spacefill.png Space-filling model of the 12-crown-4 molecule a crown ether Colour code 505050 Black Carbon C<br> F0F0F0 White Hydrogen H<br> F51E1E Red Oxygen O<br> 2011-03-12 own DS Visualizer Jynto talk Ball-and-stick version cc-zero 12-crown-4 Images by Jynto Space-filling models |