Phytochemistry, pharmacology, and ethnobotany of Fraxinus floribunda Wallich: a traditional medicinal plant of the Sikkim Himalayas

Natural products continue to play a vital role as sources of bioactive compounds with promising applications in medicine, agriculture, and biotechnology. Fraxinus floribunda Wallich, a member of the Oleaceae family, is an important medicinal plant native to the Sikkim Himalayan region. The species produces a wide range of secondary metabolites, including coumarins, flavonoids, triterpenoids, and phenolic compounds, many of which exhibit strong antioxidant, anti-inflammatory, hepatoprotective, and antidiabetic properties. Structurally, these metabolites are characterized by aromatic frameworks bearing hydroxyl, methoxy, and glycosidic groups that enhance their biological reactivity. The coumarin (benzopyrone) and flavonoid cores contribute significantly to free-radical scavenging and facilitate interactions with biological enzymes and receptors, thereby supporting multiple pharmacological effects. In addition to its medicinal value, the species holds considerable economic importance as a source of bioactive coumarins, flavonoids, and triterpenoids utilized in pharmaceutical, cosmetic, and nutraceutical industries. Traditionally, F. floribunda has been employed to relieve joint pain, arthritis, inflammation, gout, fractures, and diabetes. Experimental investigations have confirmed its anti-nociceptive, hepatoprotective, and antioxidant potential through both extract-based and compound-specific studies. Spectroscopic analyses such as UV-Vis, FTIR, NMR, and MS have been utilized for the identification and structural confirmation of its bioactive constituents. Beyond its therapeutic importance, the plant also holds economic value due to its timber and potential for producing value-added phytochemical products. This review consolidates available data on the ethnobotanical relevance, phytochemistry, and biological activities of F. floribunda, underscoring the necessity for further pharmacokinetic, mechanistic, and spectroscopic studies to support its rational development as a natural source of therapeutic agents.