Polyunsaturated aldehyde

Polyunsaturated aldehydes (PUAs) are a group of allelopathic chemicals typically associated with predator–prey interactions between diatoms (a type of single-celled alga) and small crustaceans known as copepods. These compounds are classified by an aldehyde group covalently bound to long carbon chains containing two or more carbon–carbon double bonds. Examples include isomers of heptadienal, octadienal, octatrienal, and decatrienal.

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