Kaempferol-3-O-rutinoside, also known as nicotiflorin, is a flavonoid glycoside. Its chemical structure consists of the flavonol aglycone kaempferol linked to the disaccharide rutinose (rhamnose-glucose) at the 3-hydroxyl position. It is a naturally occurring compound found in various plants, including *Carthamus tinctorius* (safflower), *Ginkgo biloba*, and *Citrus* species. This compound exhibits a range of significant biological activities, underpinning its primary research and potential therapeutic applications. It possesses notable antioxidant, anti-inflammatory, and neuroprotective properties. Studies suggest it may help mitigate oxidative stress and inflammation in models related to neurodegenerative diseases and cardiovascular conditions. Its role as a key bioactive constituent in traditional medicinal plants drives its use in pharmacological and nutraceutical research. Due to its natural origin and bioactivity profile, kaempferol-3-O-rutinoside is primarily investigated as a lead compound or reference standard in the fields of natural product chemistry, phytomedicine, and life sciences. It serves as an important tool for studying flavonoid metabolism, bioavailability, and structure-activity relationships.