👉 Semistaminate is a term used in organic chemistry to describe a compound that contains at least three carbon atoms, but no fewer than two nitrogen and one oxygen atom. It can be distinguished from a ketone or an amide by its presence of a double bond between the carbonyl group and the hydrogen atom (C-H) on the hydroxyl group. Semistaminate is often used in the synthesis of organic compounds, particularly those that contain two or more carbon atoms.