enynal
enynal
An α,β-unsaturated aldehyde of general formula either R<small><sup>1</small></sup>C≡C‒R<small><sup>2</small></sup>C=CR<small><sup>3</small></sup>‒CH=O or R<small><sup>1</small></sup>R<small><sup>2</small></sup>C=CR<small><sup>3</small></sup>‒C≡C‒CH=O, in which the aldehydic C=O function is conjugated to either the C=C double bond or C≡C triple bond at the α,β position.