The luteolin produced by our company is derived from the dried flower buds of the leguminous locust tree, namely Sophora japonica. The raw material of luteolin: Sophora japonica is mainly distributed in Henan, Shandong, Shanxi, Shaanxi, Anhui, Hebei, Jiangsu, China. Guizhou and other places. The foreign countries are mainly distributed in Southeast Asia.

Luteolin is weakly acidic and is a pale yellow crystalline powder with a melting point of 328-330°C. Luteolin is insoluble in water and soluble in alkaline liquids such as 10% sodium hydroxide. Luteolin is relatively stable under normal conditions.

Luteolin is a natural flavonoid compound that exists in many plants. Luteolin has a variety of pharmacological activities, such as anti-inflammatory, anti-allergic, anti-tumor, anti-bacterial, anti-viral, etc. Luteolin is mainly used to relieve cough, expectorant, anti-inflammatory, treat cardiovascular diseases, and treat "muscular atrophic spinal cord." Cord sclerosis", SARS, hepatitis, etc.Luteolin, mostly in the form of glycosides, exists in a variety of plants. These plants have higher content of whole-leaf green orchid, pepper, wild chrysanthemum, honeysuckle, and perilla. Luteolin has antitussive and expectorant effects. According to the latest research, respiratory symptoms, cough, sputum, and wheezing, are all related to chronic airway inflammation. For example, bronchial asthma, chronic obstructive pulmonary disease, chronic pharyngitis, allergic rhinitis, etc. cause coughing, sputum expectoration, and wheezing, which are all considered to be related to local inflammatory infiltration. The presence of inflammation makes the airway immune response chaotic, and patients often There is increased airway reactivity. The treatment method should first eliminate the chronic inflammation infiltration of the airway。Glucocorticoids are currently commonly used to eliminate airway inflammation. However, glucocorticoids have many side effects and should not be used for a long time. Studies have shown that luteolin inhibits the phosphorylation of macrophages, inhibits the activity of transcription factor NF-kB, and can inhibit the production of cytokines IL-6 and TNF-a by macrophages induced by lipopolysaccharide (LPS). The latter two cytokines play a very important role in the inflammation mechanism and are sensitive indicators that reflect the degree of inflammation. Luteolin can also increase IFN-γ, reduce specific Ig-E, and reduce the infiltration of eosinophils. In addition, luteolin has anti-inflammatory and anti-allergic effects. Luteolin also has the properties of inhibiting PDE, anti-SARS and HIV virus, the reason is to inhibit the activity of the pre-S protein of SARS virus, thereby preventing it from entering the host cell. Luteolin can also be used to treat chronic coughs caused by COPD, bronchial asthma, and chronic pharyngitis and allergic rhinitis.