lupenone

Noun

 * 1)  The triterpenoid (1R,3aR,4S,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-1-isopropenyl-3a,5a,5b,8,8,11a-hexamethyl-eicosahydro-cyclopenta[a]chrysen-9-one