Ursolic Acid (CAS: 77-52-1) is a natural pentacyclic triterpenoid compound extracted from rosemary and loquat leaves. It is a bioactive phytochemical widely applied in pharmaceutical, cosmetic, and nutraceutical research. With ≥98% purity verified by HPLC, it serves as a reliable reference material for studying inflammation, oxidative stress, and skin-aging mechanisms. Supplied with full COA, HPLC, MS, and NMR data for research use only.