At 4DrugDiscovery we have 10,000+ building blocks in stock in Gaithersburg, MD.  All of our samples are stored in a customized storage room to ensure product quality and are ready to ship the same day an order is received. Feel free to search our products here on our website either by searching the catalog number, CAS number or MDL number in the search bar or by browsing through our product classification list. Please don't hesitate to contact us if you have any questions about our research products.