Chemical constituents from Teucrium viscidum

A new guaiane sesquiterpenoid (1), two known guaiane sesquiterpenoids (2 and 3), and eleven known compounds (4-14), were isolated from Teucrium viscidum. Their structures were determined by spectroscopic analysis and by comparison of their spectral data with those reported in the literature. The absolute configuration of lipidiol (2) was determined by single-crystal X-ray diffraction analysis with Cu Kα irradiation. Compounds 12 and 13 were isolated as natural products for the first time. All compounds were isolated from T. viscidum for the first time.