kokzeylanonol obtained from have been shown to be 6β,27-dihydroxy-D:A-friedo-olean-3-one () and 6β,27-dihydroxy-D:A-friedo-oleana-3,21-dione (), respectively by the deoxygenatlon of their 27-acetoxy derivatives using Lithium-ethylene diamine reduction coupled with spectroscopic and irradiation methods. Kokzeylanonol represents the first tetraoxygenated D:A-friedo-oleanane isolated from a natural source.