Ent-17α,18-dihydroxy-kauran-19-oic acid (81) is a natural compound that can be isolated from S. pubescens[1].
References
[1] Qi Wang, et al. Herba Siegesbeckiae: A review on its traditional uses, chemical constituents, pharmacological activities and clinical studies. Journal of Ethnopharmacology. Volume 275, 15 July 2021, 114117.
