Anthraquinone
From eagle-rock.org
Anthraquinones, which exert a marked laxative effect, are contained in the bitter yellow sap of the middle leaf layer of Aloe vera.
Anthraquinone is a building block of many dyes and is used in bleaching pulp for papermaking. Anthraquinones act to stimulate muscular contraction of the large intestine and therefore have a laxative effect.
