Until recently, new drug molecules either had to be found in nature or synthesized in a lab using a few well-known procedures. This not only limited the range of molecules that could be tested, but often meant that the best ones were too expensive for commercialization. Fortunately, new breakthroughs are removing those barriers and promising to deliver a torrent of affordable new drugs in the coming decade. What are the emerging opportunities you need to know about? We’ll show you.