TH Quang, NTT Ngan, CV Minh, PV Kiem… - Journal of Natural …, 2011 - ACS Publications
Five new compounds, 16, 23, 29-trihydroxy-3-oxo-olean-12-en-28-oic acid (1), 4, 23, 29-
trihydroxy-3, 4-seco-olean-12-en-3-oate-28-oic acid (2), 3β, 6β, 23-trihydroxyolean-12-en …