paraldehyde

A colorless liquid polymer, C₆H₁₂O₃, of acetaldehyde, used as a solvent and a sedative.

A colorless liquid with a disagreeable odor and taste, C₆H₁₂O₃, obtained by treating aldehyde with sulphuric or hydrochloric acid. It is used in medicine as a hypnotic.

A trimer of acetaldehyde (C6H12O3), prepared by polymerization of acetaldehyde with hydrochloric and sulfuric acids. It has sedative and hypnotic properties.

A cyclic trimer of acetaldehyde once used as an antidepressant.

a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent