Three new kaurene diterpenes were isolated from the aerial parts of Psiadia arabica. The structures and absolute stereochemistries of these compounds were determined from their spectral data and chemical transformations; X-ray crystallographic analysis provided unambiguous characterization of one of the diterpenes.
Three new kaurene diterpenes were isolated from the aerial parts of Psiadia arabica. The structures and absolute stereochemistries of these compounds were determined from their spectral data and chemical transformations; X-ray crystallographic analysis provided unambiguous characterization of one of the diterpenes.