Patent ID: 7285672

Claim:
A process for obtaining α-mangostin from ground mangosteen rinds, said process comprising carrying out the following steps one after the other: a) extracting the plant material with an extraction solvent comprising toluene; b) concentrating and crystallizing a crude product from the extraction solvent; c) dissolving the crude product in a solvent comprising a diol and optionally further comprising toluene; d) distributing the dissolved crude product between a toluene phase and a diol phase, whereby before distributing, if toluene was not added in step c), toluene is added to the dissolved crude product or, if toluene was added in step c), optionally, further toluene is added to the dissolved crude product; e) concentrating the toluene phase and, from the concentrate, recrystallising α-mangostin from alcohol/water.