Triterpenoids from Dischidia alboflava whole plant

In this report, phytochemical constituents of Dischidia alboflava (Asclepiadaceae) collected in Bidoup Nui Ba National Park, Lamdong province, Vietnam were investigated for the first time. The isolation process, as well as structure elucidation, have been supported by modern techniques like chromatographic (TLC, CC) and spectroscopic (ESI MS, 1D and 2D NMR) methods to result six triterpenoids, including β-amirin acetate (1), friedelin (2), 3α-hydroxyglutin-5-en (3), lupeone (4), lupeol (5), and 30-norcyclopterospemol (6). Among these, compounds 3, 4, and 6 have not been recorded to occur in other Dischidia species before. Notably, the identification of compound 6 indicated the presence of cyclotriterpene in Dischidia chemical components, which has not been reported to date.