Chemical constituents of the pericarp of Toona sinensis and their chemotaxonomic significance

Phytochemical investigation of the pericarp of Toona sinensis (A. Juss.) Roem (Meliaceae) led to the isolation and identification of 33 compounds, namely, 7 apotirucallane-type triterpenoids (1-7), 2 cycloartane-type triterpe-noids (8-9), 5 sterols (10-14), 2 sesquiterpenes (15-16), 2 lignans (17-18), 3 flavonoids (19-21), and 12 phenols (22-33). The chemical structures of these compounds were elucidated based on spectroscopic data and comparison with previously reported data. This is the first report of compounds 11-12, 16, 18, 23, and 31 from the family Meliaceae, compounds 13-15, 26, and 30 within the genus Toona, and compound 33 from T. sinensis. The chemotaxonomic significance of the isolated compounds is also described in this study.