Occurrence of Mangiferin in Hiptage madablota Geartn

A bright yellow, crystalline compound, m.p. 271–274°, isolated from the root-bark of Hiptage madablota Geartn. has been identified as mangiferin, 1,3,6,7-tetrahydroxy-2-C- β -D-glucosylxanthone, by direct comparison of its properties and those of its derived 3,6,7-trimethyl ether with those of authentic samples. Mangiferin was assayed in three biological test systems and the results are given.