Chemistry

A gateway to selected drug information from the U.S. National Library of Medicine and other key U.S. Government agencies. A good source for finding drug side-effects, drug category info, and manufacturers. Links to literature in PubMed.

Comprehensive, peer-reviewed toxicology data for about 5,000 chemicals.

Provides information on the biological activities of small molecules. Links to PubMed scientific literature and NCBI's protein 3D structure resource.

ChemSpider is a free chemical structure database providing fast text and structure search access to over 26 million structures from hundreds of data sources