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Fisetin is a kind of polymer pharmaceutical raw material.This product is a yellow acicular crystal, derived from the sumac tree Rus succedaneal, Cotinus, etc.Soluble in ethanol, acetone and acetic acid.Almost insoluble in water, ether, benzene, chloroform and petroleum ether.It had inhibitory effect on prostatic cord formation of 3T3 fibrocytes transformed by methylcholanthrene, and the half effective inhibitory concentration (ID50) was 42.0UM.It can inhibit the total sugar reductase in the lens of rats, and the half effective inhibition concentration is 10-6m.The effect of papaverine on the spasmolysis of acetylcholine was 166% of that of papaverine in the small intestine of mice.A team of Japanese and American researchers found that lushanthin, which is found in vegetables and fruits, can help improve memory in animal experiments.