Isoquercitrin (CAS: 482-35-9)is a natural flavonoid glycoside derived from Sophora japonica and other medicinal plants. With ≥98% purity confirmed by HPLC, it is widely used in pharmaceutical and biomedical research for studying antioxidant, anti-inflammatory, and neuroprotective mechanisms. Supplied with full COA, HPLC, MS, and NMR data for research use only.