What does polyene mean?
A polyene is an organic compound whose structure contains two or more carbon–carbon double bonds. The name reflects this feature: the prefix poly- indicates several, while -ene identifies an unsaturated hydrocarbon framework. Polyenes occur in many areas of chemistry, including the study of conjugated systems, natural pigments, and polymers. In medicine, the term also refers to a class of antifungal drugs that disrupt fungal cell membranes, often by binding to membrane sterols such as ergosterol. Examples include amphotericin B and nystatin. The word is therefore both a structural description in organic chemistry and a name for an important family of medicines. When used in a chemical context, it should not be confused with a polymer, which is defined by the repetition of molecular units rather than by the presence of multiple double bonds.
An organic compound containing two or more carbon–carbon double bonds.
"Researchers isolated a fluorescent polyene from the organism."
In chemistry, the term may refer to conjugated or non-conjugated compounds, provided the structural requirement of multiple double bonds is met.
Any of a class of antifungal medicines that act on fungal cell membranes, including amphotericin B and nystatin.
"The polyene was administered intravenously to treat the infection."
This medical use is especially common in pharmacology and infectious-disease contexts.
Plural is used when referring to multiple compounds with multiple carbon–carbon double bonds or to multiple drugs in the antifungal class.
"Several polyenes were screened for antifungal activity."
From fungal pigments to life-saving antifungals, many polyenes have changed medicine by revealing how a molecule can target the membranes of disease-causing cells.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does polyene come from?
Polyene was formed in the early 20th century from Greek poly-, meaning “many,” and the chemical suffix -ene, which refers to unsaturated hydrocarbons. The suffix itself is associated with the ending of names such as ethylene and acetylene. The combined term reflects the presence of several carbon–carbon double bonds in a molecule and later became established in pharmaceutical usage for a family of antifungal compounds.
Related word forms
How polyene is actually used
In general chemistry, the term is used for compounds with multiple double bonds. In medicine, it commonly refers to a class of antifungal drugs such as amphotericin B and nystatin. The abbreviation in the chemical sense is not restricted to conjugated systems, although many well-known examples are conjugated polyenes.
Easily confused with polyene
A polyene is a molecule with multiple carbon–carbon double bonds, whereas a polymer is a substance composed of many repeating molecular units.
A polyene is defined by its unsaturated carbon chain, while a polyphenol contains multiple hydroxyl groups attached to an aromatic structure.