In an earlier communication, isolation and characterization of five new alkaloids was reported. One of these alkaloids, Vakognavine, was initially formulated as C35H41O10N and found to have one benzoate group and three acetate groups as substituents. To elucidate its structural framework, Vakognavine was dehydrogenated by heating with excess selenium at 300° for 7 hours. The acid fraction contained benzoic acid, and the neutral fraction was separated via alumina column chromatography to yield an aromatic hydrocarbon. This hydrocarbon was identified by direct comparison (UV spectrum, melting points of TNB-adduct and picrate) with an authentic sample from Prof. Okamoto as 1,8-dimethyl-7-ethyl phenanthrene, indicating Vakognavine belongs to the atisine group of diterpene alkaloids. The basic fraction yielded no pure product, and aromatic product yields were poor due to high oxygen substitution on the skeleton. Vakognavine shares the carbon skeleton (II) with songorine and has a structural framework (I) analogous to other diterpene alkaloids—unusually high oxygen substitution for atisine group alkaloids. Mass spectrum confirmed one C-CH3, one benzene ring, three acetates, and one N-CH3 group; the nitrogen bears a methyl (not ethyl) group, correcting the molecular formula to C34H37O10N (from C35). Catalytic reduction with Adams catalyst produced a hexahydro compound (C34H43O10N) where the exo-cyclic methylene group and both carbonyl groups were reduced.