Patent ID: 8287889

Claim:
A freeze-dried ursolic acid nano-powder for injection, including a predetermined amount of raw ursolic acid, nano-particle composite support for carrying said raw ursolic acid, and freeze-dried accessories as accessories additives for freeze drying said raw ursolic acid, wherein said nano-particle composite support comprises a predetermined amount of bean lecithin and a predetermined amount of stearic acid, wherein a weight ratio of said raw ursolic acid, said nano-particle composite bean lecithin, said stearic acid, and said freeze-dried accessories is 0.1-10:0.3-30: 0-10:0.1-20; wherein said freeze-dried accessories comprises an excipient agent selected from a group consisting of mannitol, lactose for injection, sodium glycine, sodium dihydrogenphosphate, and amino acetic acid; wherein an average diameter of said nano-powder is 209.5 mm, wherein an enveloping rate of said nano-powder is 88.3%, and a drug loading of said nano-powder is 25.2%, wherein a zeta potential of said nano-powder is âˆ’31.67 mV.