(−)-Spirolepechinene, a spirosesquiterpene from Lepechinia bullata (Lamiaceae)

Spirolepechinene, a new sesquiterpene hydrocarbon, and the previously described spirovetivane premnaspirodiene were isolated from the essential oil of the leaves of Lepechinia bullata collected in Venezuela. Their structures have been established by means of spectroscopic methods.