In organic chemistry, an aldehyde (/ˈældɪhaɪd/) (lat. alcohol dehydrogenatum,[1] dehydrogenated alcohol) is an organic compound containing a functional group with the structure R−CH=O.[2] The functional group itself (without the "R" side chain) can be referred to as an aldehyde but can also be classified as a formyl group. Aldehydes are a common motif in many chemicals important in technology and biology.[3][4]
March
was invoked but never defined (see the help page).