Chemspace database currently lists over 80 million in-stock and make-on-demand chemical building blocks available for ordering. It is by far the largest offer of molecules you can use to build new compounds or optimize hits. The offer is delivered by world-known suppliers and is continuously growing by adding compounds from new suppliers. So, you do not need to go one by one but find all the molecules in one place, or use our API and KNIME nodes to access Chemspace database.