PubChem
PubChem is an open chemistry database at the National Institutes of Health (NIH).
Full description for PubChem
Medicinal Chemistry
Databases
SciFinder
SciFinder provides access to several Chemical Abstracts Service databases, including Chemical Abstracts, Registry, CASREACT, CHEMLIST, and CHEMCAT.
Full description for SciFinder
Thieme Pharmaceutical Substances
Pharmaceutical Substances is a complete reference guide to every pharmaceutical compound of significance. It provides a compendium to some 2300 active pharmaceutical ingredients of interest t