We have surely come a long way from the days when we used awkward ball and stick models to represent chemical compounds in high school chemistry class. Now, there's a public chemistry website you can go to locate the exact chemical structure you are looking for, and a simple system for identifying this structure and generating an STL file for it on the NIH's 3D Print Exchange website. Here, in this Instructable from Greg Williams, aka entomophile, we walk through four steps to get you that 3D printable chemical compound model. The tricky part is the 3D printing, and entomophile decided to have Shapeways print out his DDT model. The stand was an easy enough print that he was able to do that one from home on his Ultimaker 2. If you've been itching to get some of your favorite chemical structures in 3D model form, this is the way to do it! Read more at 3DPrint.com: http://3dprint.com/113549/3d-print-chemical-structures/