Abstract
In spite of several studies of Stachys species, the literature lacks any information about the constituents of S. yemenensis Hedge. We report here the isolation of a new sesquiterpenetriol, stachytriol (1), along with the known compounds β-sitosterol (2), ursolic acid (3), penduletin (4), and benghalensin B (5). The structure elucidation of all isolated compounds was performed by extensive 1D and 2D NMR spectroscopic investigation.