SCIENCE - Scientists map all possible drug-like chemical compounds: Library of millions of small, carbon-based molecules chemists might synthesize

Drug developers may have a new tool to search for more effective medications and new materials. It's a computer algorithm that can model and catalog the entire set of lightweight, carbon-containing molecules that chemists could feasibly create in a lab.

http://www.sciencedaily.com/releases/2013/04/130422154945.ht