Volatile Constituents of Montanoa tomentosa and Lippia graveolens.

The constituents of the volatile oils of MONTANOA TOMENTOSA and LIPPIA GRAVEOLENS, were investigated using capillary GC/MS. Borneol acetate, beta-cubebene, and beta-caryophyllene were found to be the major constituents of the volatile oil of M. TOMENTOSA, while P-cymene, 1,8-cineol, thymol, and carvacrol were the major volatile components of L. GRAVEOLENS. The possible correlation between the high concentration of monoterpenes and the alleged antifertility effect of the title plants is discussed.