Volatile Constituents of Two Labiateae Species from Iran and Antibacterial Activity of the Acetone Extract of Them

Abstract The oils obtained by hydrodistillation of the aerial parts of Salvia brachyantha Bords. (probed.) and Stachys byzantina C. Koch grown in Iran, were analyzed by GC and GC-MS .Forty five compounds representing 95.06 % of the oil of S. brachyantha were identified of which 1,8-cineole (10.19 %), γ-muurolene (7.54 %), caryophyllene oxide (6.66 %), spathulenol (6.19 %) and elemol (5.89 %) were the major constituents. Furthermore 1,8-Cineole (16.35 %), hexadecanioc acid (7.42 %), camphor (6.76 %) and borneol (5.74 %) were found as the main components among 25 constituents in the oil of St. byzantina representing 94.30 % of the total compounds. Acetone extract of the aerial parts of two herbs were tested against 6 gram(+/-) bacteria by measurement of growth inhibitory zones.