871700-20-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 871700-20-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,1,7,0 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 871700-20:
(8*8)+(7*7)+(6*1)+(5*7)+(4*0)+(3*0)+(2*2)+(1*0)=158
158 % 10 = 8
So 871700-20-8 is a valid CAS Registry Number.
871700-20-8Relevant articles and documents
Method for synthesizing key intermediate of trametinib
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Paragraph 0028, (2019/02/27)
The invention discloses a method for synthesizing a key intermediate of trametinib, malonic acid monomethyl amide monoethyl ester and isosuccinic acid have a ring-closure reaction to obtain a crude product of a pyridine triketone compound; the obtained cr