Examination of the heartwood of Dacrydium bidwillii has shown the presence of isopimara-7,15-diene, isopimaradienal, isopimaradienol, manool, torulosol, β-sitosterol, and isopimaric acid. A nor-diterpene isolated was shown to be 18-nor-isopimaradien-4a-ol (I), and this was confirmed by its synthesis from isopimaradienal.