ChEBI (Chemical Entities of Biological Interest) is a dictionary of small molecular entities. It is manually annotated and provides a chemical ontology to describe small molecules, including their biological and chemical roles.

ChEMBL is a database of bioactive compounds that focuses on interactions between small molecules and their macromolecular targets, including medicinal chemistry, clinical development and therapeutics data.

The Enzyme Portal integrates publicly available information from the UniProt Knowledgebase, the Protein Data Bank in Europe, Rhea, Reactome, IntEnz, ChEBI, ChEMBL, Cofactor and MACiE.

A curated database of drug targets, prescription medicines and experimental drugs.

MetaboLights is a database for metabolomics experiments and derived information. 

SugarBind covers knowledge of glycan binding of human pathogen lectins and adhesins. Information is collected by experts from articles published in peer-reviewed scientific journals.

A knowledge resource for lipids and their biology.