Dimeric Proanthocyanidins from Platanus orientalis Bark

摘要

Seven species of plane-tree (Platanaceae) are distributed throughout the plant kingdom. Eastern plane-tree (Platanus orientalis) occurs in Middle Asia. Leaves of plane-tree are used in folk medicine as a wound-healer and ophthalmologic agent (for blepharitis and conjunctivitis); roots, as a hemostatic agent and antivenom for snake bite. Extracts of plane-tree leaves and buds are rich in biologically active substances such as flavonoids, isoprenoids, phytosterols, and vitamins. Flavonoids isolated from its buds possess a wide spectrum of physiological activity. Investigations of fallen leaves of plane-tree showed that they are rich in a-tocopherol and its derivatives [1]. Phytol derivatives from plane-tree leaves exhibited also anti-ulcer activity [2].