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22877-03-8

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22877-03-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22877-03-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,8,7 and 7 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 22877-03:
(7*2)+(6*2)+(5*8)+(4*7)+(3*7)+(2*0)+(1*3)=118
118 % 10 = 8
So 22877-03-8 is a valid CAS Registry Number.

22877-03-8Relevant articles and documents

A method of chemical synthesis mao Ruiyi flavonoid (by machine translation)

-

, (2017/07/21)

The invention relates to a method for preparing mao Ruiyi flavonoid, comprises the following steps: to resorcinol and 3 - hydroxy -4 - methoxy acetic acid (as the starting material, to make the 3 ', 7 - dihydroxy -4' - methoxyisoflavone, then through the acetylation reaction to obtain the double-b acylated product 3 ', 7 - acetoxy -4' - methoxyisoflavone; selective shall get rid of the 7 bit on the hydroxy protecting group and gets the 7 - hydroxy -3 '- acetoxy -4' - methoxyisoflavone; the 7 position hydroxy generating glycosidic bond to obtain 3 '- acetoxy -4' - methoxyisoflavone - 7 - O - beta - D - tetra-substituted-based glucoside, finally through complete hydrolysis, removing the protecting group to obtain mao Ruiyi flavonoid, namely calycosin - 7 - O - beta - D - glucoside. The invention develops mao Ruiyi flavonoid glycoside of chemical synthesis method, this synthetic route raw materials are easy, and the cost is low, mild reaction conditions. (by machine translation)

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