MeSH

orally active inhibitor of neutrophil elastase; structure in first source

Date introduced: August 12, 1994

Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are considered to be larger versions of peptides that can form into complex structures such as ENZYMES and RECEPTORS.

Six-membered heterocycles containing an oxygen and a nitrogen.

A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form.

Year introduced: 1998

Peptides composed of between two and twelve amino acids.

Year introduced: 1973

Hydrocarbon compounds with one or more HYDROGEN atoms substituted with HALOGENS.

Year introduced: 1966

Inert liquid or gaseous halocarbon compounds in which FLUORINE replaces some or all HYDROGEN atoms.

Year introduced: 1974

Organic compounds that primarily contain carbon and hydrogen atoms with the carbon atoms forming a linear or circular structure.

Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.

Year introduced: 1998

Cyclic compounds that include atoms other than carbon in their ring structure.

Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions, and fluorocarbon blood substitutes. Perfluorinated and related polyfluorinated chemicals are referred to as PFAS and are defined as chemicals with at least two adjacent carbon atoms, where one carbon is fully fluorinated and the other is at least partially fluorinated.

Year introduced: 1977(1975)

Amino acids and chains of amino acids connected by peptide linkages.

Year introduced: 1998