Chemical constituents from the bark of Betula pendula and their chemotaxonomic significance

Phytochemical investigation of the bark of Betula pendula led to the isolation of three triterpenoids (1-3), seven fatty acid derivatives (4-10), two butylbenzene derivatives (11-12), one phenylpropanoid (13), one phenolic acid (14), and one diarylheptanoid (15). The structures of these compounds were elucidated using spectroscopic methods. Compounds 3-6, 8-10, 12 and 14 serve as valuable chemotaxonomic markers for B. pendula in the Betulaceae family since there are no reports of their isolation in Betulaceae species. Additionally, compound 13 was isolated from B. pendula for the first time.