Chemical constituents from Tsoongiodendron odorum Chun

The present study reports the isolation of sixteen lignans (1–16), an aporphine alkaloid (17), two phenolic amides (18 and 19), and a germacrane sesquiterpene lactone (20) from T. odorum. Except for compound 20, the other isolated constituents are firstly reported from T. odorum. And in this study, three polylignans (11–13) and six norlignans (5–7, 14–16) are reported for the first time from the Magnoliaceae family, which may support the opinion to establish Tsoongiodendron as a monotypic genus from a chemotaxonomical point of view.

► Sixteen lignans (1–16), an aporphine alkaloid (17), two phenolic amides (18 and 19), and a germacrane sesquiterpene lactone (20) were isolated from T. odorum.
► Except for compound 20, the other isolated constituents are firstly reported from T. odorum.
► Three polylignans (11–13) and six norlignans (5–7, 14–16) are reported for the first time from the Magnoliaceae family.
► This finding may support the opinion to establish Tsoongiodendron as a monotypic genus from a chemotaxonomical point of view.