Terpenoids from Stems and Leaves of Cupressus gigantea

Abstract Aim To study the chemical constituents of Cupressus gigantea . Methods The chemical constituents were isolated by various chromatographic methods, and the chemical structures were elucidated on the basis of spectral analysis (NMR, MS). Results A new labdane-type diterpenoid, fourteen known diterpenoids, and two known sesquiterpenoids were isolated from the stems and leaves of Cupressus gigantea . The structure of the new compound ( 1 ) was elucidated on the basis of the analysis of spectroscopic data. Conclusion Compound 1 is a new sesquiterpenoid, compounds 1–17 were isolated from this plant for the first time.