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4670-34-2

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4670-34-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4670-34-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,7 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 4670-34:
(6*4)+(5*6)+(4*7)+(3*0)+(2*3)+(1*4)=92
92 % 10 = 2
So 4670-34-2 is a valid CAS Registry Number.

4670-34-2Downstream Products

4670-34-2Relevant articles and documents

Synthetic method of oroxylin

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, (2020/05/14)

The invention relates to a synthetic method of oroxylin. The method disclosed by the invention comprises the following steps: carrying out acetylation reaction on 5, 6, 7-trihydroxy flavone and aceticanhydride in pyridine at room temperature; reacting an obtained acetylate with benzyl bromide or benzyl chloride in the presence of an inorganic base, and carrying out hydrolysis reaction on a product in alkaline water; and reacting with methyl iodide in the presence of an inorganic base, and finally debenzylating in the presence of concentrated sulfuric acid to obtain the target product oroxylin. The method for synthesizing oroxylin provided by the invention has the advantages of simple and feasible operation, high product purity, high reaction yield and the like, and is easier for industrial production compared with the existing method.

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