A novel dicyanotriterpenoid, 2-cyano-3,12-dioxolorana-1,9(11)-dien-28-onitrile, active at picomolar concentrations for inhibition of nitric oxide production. - Honda,T.; Honda,Y.; Favaloro,F.G.; Gribble GW,J.r.; Suh,N.; Place,A.E. (Bioorg Med Chem Lett, 2002)