Loquat leaf ursolic acid

It is the leaves of loquat belonged to rosaceae plant. It is green arbor or shrub. Its leaves are alternative and long oval-shaped or inverted ovate. There are scattered sawtooth on the edge. There are many fold in the front of base.There are thick and rusty nap behind the base. It is fostered all over the world, and wildly grows up in SiChuan and HuBei province .It can be picked all the year.