A new sesquiterpene, 7-epi-teucrenone, and six novel nor-sesquiterpene
s, teuhetone, teuhetenone A, teuhetenone B, tephyllone, 9 beta-hydroxy
-tephyllone and 9-oxo-tephyllone, have been isolated from the aerial p
arts-of Teucrium heterophyllum. This plant also contains the known ter
pene 3-oxo-alpha-ionol (3,4-dehydro-biumenol C).