The reported investigation of the constituents of the petroleum ether extract of the root of Salvia officinalis L. confirmed the presence of the following diterpene quinones: 12.hydroxy-8, 12-abietadiene-11, 14-dione (royleanone), 7 alpha, 12-dihydroxy-8.12-abistadiene-11-14-dione (horminone) and 7