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Molecular formula : MW : CAS :
nature : Compositae Hill Road, the grass buds, the active ingredients. Bian colorless color-columnar crystals or a white crystalline powder. Met into yellow light. Bitterpungent. Density 1.187. 170-173 ° C melting point. Stability in the air. Do not dissolve in water, boiling water-soluble and insoluble in cold ethanol, soluble in hot ethanol, chloroform and alkaline solution. Flooding on medicine for drug roundworm. Toxicity large have been eliminated.
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