Keywords: 17-Hydroxyprogesterone-3D-balls.png Ball-and-stick model of the 17-hydroxyprogesterone molecule a steroid hormone 505050 Black Carbon C<br> F0F0F0 White Hydrogen H<br> F51E1E Red Oxygen O<br> 2011-03-12 own DS Visualizer Jynto talk Space-filling version Skeletal stick version cc-zero 3-Oxo-steroids Images by Jynto Ball-and-stick models |