Chemical constituents of Trachelospermum dunnii (H.Lév.) H.Lév.

Phytochemical investigation on the aerial parts of Trachelospermum dunnii led to the isolation and identification of 16 compounds, including nine dibenzylbutyrolactone lignans (1-9), two furanoid lignans (10-11), one dihydrobenzofuran lignan (12), one aryltetralin lignan (13), two flavonoids (14-15), and one phenolic compound (16). The structure of compound 1 was elucidated by means of spectroscopic analyses, including HRESIMS, and 1D and 2D NMR experiments. Compounds 1-16 are reported from title plant for the first time, while compounds 1-2, 10-12, and 14-16 have not been recorded previously in genus Trachelospermum. The dibenzylbutyrolactone lignans may serve as chemotaxonomic markers of T. dunnii.