File talk:Caffeine Molecule.png
Appearance
The description of this image would be improved if it identified the color coding involved. I presume that black spheres represent Carbon atoms and gray Hydrogen; I'm less clear on the meaning of the blue and red spheres which I presume are Nitrogen and Oxygen in some order. --SteveMcCluskey (talk) 13:49, 11 March 2008 (UTC)