ChEBI: Alpha-onocerin is a triterpenoid that is ethane in which each carbon has been substituted by a (1R,4aR,6S,8aS)-6-hydroxy-5,5,8a-trimethyl-2-methylenedecahydronaphthalen-1-yl group. It has a role as a plant metabolite. It is a triterpenoid, a secondary alcohol, a diol and an olefinic compound.