Wiktionary
mangiferin
n. (context biochemistry English) The glycoside ''2-β-D-glucopyranosyl-1,3,6,7-tetrahydroxyxanthen-9-one'' that has some use as an antioxidant. It is a glucoside of norathyriol.
Wikipedia
Mangiferin
Mangiferin is a xanthonoid. This molecule is a glucoside of norathyriol.