The PubChem Project

PubChem, a component of the National Institutes of Health Molecular Libraries Roadmap Initiative, is a database of the biological activities of small molecules. PubChem also provides a fast chemical structure similarity search tool. Links from PubChem's chemical structure records to other Entrez databases provide information on biological properties. These include links to PubMed scientific literature and NCBI's protein 3D structure resource. Links to PubChem's bioassay database present the results of biological screening. Links to depositor web sites provide further information. A PubChem FTP site, Download Facility, Power User Gateway(PUG), Standardization Service, Score Matrix Service, Structure Clustering, and Deposition Gateway are also available.