ChEBI
Homepage URL: https://www.ebi.ac.uk/chebi/
Description: Chemical Entities of Biological Interest (ChEBI)is a freely available dictionary of 'small molecular entities' or any constitutionally or isotopically distinct atom, molecule, ion, ion pair, radical, radical ion, complex, conformer, etc., identifiable as a separately distinguishable entity. The molecular entities in ChEBI are either products of nature or synthetic products used to intervene in the processes of living organisms (either deliberately, as for drugs, or unintentionally', as for chemicals in the environment). The qualifier 'small' implies the exclusion of entities directly encoded by the genome, and thus as a rule nucleic acids, proteins, and peptides derived from proteins by cleavage are not included. Classes of molecular entities and part-molecular entities (in the form of substituent groups or atoms) are included in ChEBI. ChEBI incorporates an ontology, whereby the relationships between compounds, groups, or classes of compounds and their parents, children, and/or siblings are specified.
Example record:
Additional links: