Sesquiterpenoids from the Rhizomes of Homalomenaocculta

摘要

AbstractNaturally occurring oplopanane sesquiterpenoids are rarely reported. A phytochemical investigation on the rhizomes of Homalomena occulta (Lours) has resulted in the discovery of six oplopanane sesquiterpenoids (>1–>6), including four new (>1–>4) and one 3,5-seco-oplopanane (>6), together with three previously reported sesquiterpenoids (>7−>9). In addition three new oplopananes (>2a–>4a) were also obtained by chemical transformation. All structures of these sesquiterpenoids were established based on the comprehensive spectroscopic analyses, including NMR, MS, and IR, and comparing with the literatures.