In organic chemistry, an aldehyde (/ˈældɪhaɪd/) is an organic compound containing a functional group with the structure R−CH=O.[1] 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.[2][3]
March
was invoked but never defined (see the help page).