From the ethyl acetate extract of the roots of Callerya speciosa (Champ.) Schot. collected in
Vietnam, a new oleanane triterpenoid, 22β-acetoxy-3β,24-dihydroxy-12-oleanen-30-oic acid (1), along
with three known compounds, medicarpin (2), maackiain (3), and β-sitosterol (4), were obtained. The
structure of the new compound was elucidated by HR-MS, 1D and 2D NMR experiments.