CAS No.: 77-52-1 Molecular formula: C30H48O3 Molecular weight: 456.71 EINECS No.: 201-034-0 Ursolic acid is widely distributed in the plant kingdom, such as hawthorn, dogwood, hedyotis diffusa, gardenia, plantain, and Prunella vulgaris, which contains ursolic acid in the form of free or glycosides combined with sugar. It is distributed in about 7 families, 46 Chemicalbook genera, 62 species of plants, mainly including the leaves of Ligustrum lucidum in the Oleaceae family, the bear fruit in the Rhododendron family, the leaves of loquat in the Rosaceae family, the leaves of paulownia in the Scrophulariaceae family, and the whole grass of Prunella in the Labiatae family, The leaves of Ilex, Ilex and Ilex.