<unk>  (or<unk>  is a laxative.   It is closely related to bisacodyl, sodium picosulfate, and phenolphthalein. Long term use is associated with liver damage, and as a result, it was withdrawn in most countries in the early 1970s.  The acetate derivative<unk>  acetate was also once used as a laxative.
Natural chemical compounds similar to<unk>  may be present in prunes, but a recent review of the relevant scientific literature suggests that the laxative effect of prunes is due to other constituents including phenolic compounds (mainly neochlorogenic acids and chlorogenic acids) and sorbitol.
Oxyphenisatine
Methysergide
Vintafolide
Cabergoline
Cloricromen
Flurandrenolide
Metizoline
Etozoline