Keywords: Allantoin-3D-spacefill.png Space-filling model of the allantoin molecule a compound found in the urine of most mammals Colour code 505050 Carbon C black<br> F0F0F0 Hydrogen H white<br> F51E1E Oxygen O red<br> 3C50FA Nitrogen N blue<br> 2011-06-09 own DS Visualizer Jynto talk Ball-and-stick version cc-zero Allantoin Images by Jynto Space-filling models |