Cassane Diterpenoids from the Aerial Parts of and Their Antifeedant and Insecticidal Activities against and .

Ten new cassane diterpenoids, caesalpulcherrins A-J (-), together with 11 known analogues (-) were isolated from the aerial parts of . Their structures and relative stereochemistry were elucidated by spectrometric and spectroscopic methods, including one-dimensional (1D) and two-dimensional (2D) NMR, high-resolution electrospray ionization mass spectrometry (HRESIMS), and single-crystal X-ray diffraction analysis. Compounds - represent the first examples of 2,5-dimethoxyfuranocassane diterpenoids.