New barrigenol-type triterpenoids with anti-Alzheimer’s disease activity from Koelreuteria paniculata Laxm.

Koelreuteria paniculata Laxm. has long been cultivated as a traditional ornamental tree in the world, and is developed as a source of natural green food. In this work, five new barrigenol-type triterpenoids, compounds 1–5, were isolated from the seeds of Koelreuteria paniculata Laxm. and elucidated by right of several spectroscopic methods. We studied the impacts of compounds 1–5 on learning and memory impairment induced by okadaic acid (OA) in...