It was also found from
LC–MS results that the a-mangostin and 8-desoxygartanin standards
and the ethanolic extracts of mangosteen rind have the same
m/z values and retention time; the mass spectra of 409.1685 m/z
in the case of a-mangostin and 379.1555 m/z in the case of 8-desoxygartanin
were noted both in the standards and ethanolic extracts
(MS spectra are not shown).