Chemical Constituents of Syringa pinnatifolia and its Chemotaxonomic Study

Phytochemical investigation of the stem of Syringa pinnatifolia Hemsl led to the isolation of 13 lignans (4–12, 14–17) and four phenolic compounds (1–3, 13), in which a new lignan (14) was isolated from this plant and compounds 5 and 6 were found for the first time in the genus Syringa. Lignans are major compounds in this plant, which may be used as chemotaxonomic markers for the genus...