Phytochemical investigation on the leaves of Ailanthus altissima (Mill.) Swingle

Eleven compounds including seven triterpenoids (1–6, 8), one steroid compound (7), two β-carbolines (9–10) and an indole (11) were isolated from the leaves of Ailanthus altissima (Mill.) Swingle. The structures of these compounds were elucidated by extensive spectroscopic methods and comparison with literature data. Among them, six compounds (1, 2, 3, 6, 7, and 11) were isolated from Simaroubaceae for the first time. A compounds-families network was constructed and the chemotaxonomic significance of these compounds was discussed.