PubChem is project of three databases (PubChem Substance, PubChem Compount, and PubChem Bioassay) that link small organic molecules to bioactivity assays, PubMed abstracts, and protein sequences and structures.

These three PubChem databases are linked to several related NLM Entrez databases, including PubMed, Protein, and Structure. The PubMed links are derived either from citations provided by submitters or by matching substance names to the MeSH medical thesaurus.

For more information about PubChem go to the NLM Technical Bulletin.

Access PubChem at: http://pubchem.ncbi.nlm.nih.gov/.