Three Novel 24,30-Dinortriterpenoids, Paeonenoides A-C, fromPaeonia veitchii

Three novel 24,30-dinortriterpenoids named paeonenoides A–C (1–3) and the four related acetonide derivatives 4–7, most likely artifacts of isolation, together with a known triterpenoid, akebonic acid (8), were isolated from the root cortex of Paeonia veitchii. Their structures were established by spectroscopic means. The 24,30-dinor skeleton of triterpenoids occurs rarely in nature.