Light petroleum extracts of the bark of the Carpano tree, a Cinnamomum sp. of the Family Lauraceae native to Bougainville, yielded a colourless crystalline material carpanone (I) (C₂₀H₁₈O₆, M⁺ 354) among other compounds. Hydrogenation of (I) over Pt in acetic acid gave dihydrocarpanone (II) (C₂₀H₂₀O₆, M⁺ 356). Treatment of (II) in acetic anhydride with 96% sulphuric acid followed by work-up yielded diacetate (III) (C₂₄H₂₄O₈, M⁺ 440). Proton NMR data, including spin decoupling experiments, for (I), (II), and (III) were obtained using Varian instruments. The series of transformations and spectroscopic data enabled deduction of the structures and relative stereochemistries of (I), (II), and (III). In addition to (I), smaller quantities of two other compounds were isolated, the first being isocarpanone.