Use the Compound Search function find chemical information about biological properties. From the National Center for Biotechnology Information, which is part of the National Library of Medicine.
Detailed drug (i.e. chemical, pharmacological and pharmaceutical) data and comprehensive drug target (i.e. sequence, structure, and pathway) information provided by University of Alberta and The Metabolomics Innovation Centre.
This dictionary of over 400,000 chemicals (names, synonyms, and structures) includes links to National Library of Medicine and other databases and resources,