A new neo-clerodane diterpenoid, 2-deoxychamaedroxide, has been isolated from the aerial parts of Teucrium divaricatum subsp. canescens. Also identified were the previously known diterpenoids teuflin, teucrin H2, teuflidin, teucrins A, F and G, 6.beta.-hydroxy-teuscordin, montanin D and dihydroteugin. The structure of 2-deoxychamaedroxide, (12S)-47b,6.beta.; 15,16-diepoxy-neo-clerodane-13(16),14-diene-18,19;20,12-diolide, was established mainly by spectroscopic means.