Hexanic extracts of plant leaves (HEPL) of sixteen species have been i
nvestigated for their triterpenic ketone content Five pentacyclic keto
nes have been identified by GC/IR-FT and GC-MS, i. e. arborinone, tara
xerone, lupenone, friedelin and beta-amyrinone. A sixth one could not
be identified. Two species represented interesting sources : Ruscus ac
uleatus (12,5 % lupenone/HEPL) and Senecio bicolor (8, 1 % beta-amyrin
one/HEPL).