Wiktionary
dantron
n. (context organic compound English) chrysazin
Wikipedia
Dantron
Dantron ( INN), also known as chrysazin or 1,8-dihydroxyanthraquinone, is an organic substance, formally derived from anthraquinone by the replacement of two hydrogen atoms by hydroxyl groups (–OH). It is used in some countries as a stimulant laxative.
It should not be confused with ondansetron, an unrelated drug that was marketed in South Africa under the trade name "Dantron".