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 identified by spectroscopic analyses 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 K alpha radiation. Compounds 12 and 13 were isolated as natural products for the first time. All compounds were isolated from T. viscidum for the first time. (C) 2013 Elsevier Ltd. All rights reserved.