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Urguo acid belongs to pentacyclic triterpenoids, has liver protection, anti-tumor anti-inflammatory, antiviral, improve body immunity, whitening and other effects, so it is widely used as health food, medicine and cosmetics raw materials.However, there are still obvious deficiencies in the application of fruit acid: low water solubility makes low bioavailability.The formation of supermolecular body can significantly improve the physical, chemical and biological properties of the object molecule urgulic acid.Since the formation of the supramolecule mainly depends on the weak interaction force between the host and guest molecules, and because the ultra-high pressure will affect the interaction force between the host and guest molecules, it is possible to prepare the supramolecule body.

The introduction of hydroxypropyl breaks the intramolecular cyclic hydrogen bond of bethe cyclodextrin, overcoming the major disadvantage of poor water solubility while maintaining the cyclodextrin cavity.It is one of the most intensively studied and widely used cyclodextrin derivatives.Mainly used in the food, medicine, cosmetics industry.