Polygalasaponin XXVIII is a triterpenoid saponin that can be isolated from Polygala japonica Houtt.[1].
References
[1] Quang T H, et al. Triterpenoid saponins and phenylpropanoid glycosides from the roots of Polygala japonica Houtt. with anti-inflammatory activity[J]. Phytochemistry Letters, 2018, 24: 60-66.
