1557268-61-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1557268-61-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,5,7,2,6 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1557268-61:
(9*1)+(8*5)+(7*5)+(6*7)+(5*2)+(4*6)+(3*8)+(2*6)+(1*1)=197
197 % 10 = 7
So 1557268-61-7 is a valid CAS Registry Number.
1557268-61-7Relevant articles and documents
Novel synthesis route and maleate dihydrate of avitinib
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, (2019/10/01)
The invention discloses a novel synthesis route of avitinib. 2-chlorine-4-(3-nitryl phenoxy)-7-hydrogen-(pyrrolo[2,3-d] pyrimidine)-1-methyl tert-butyrate is adopted as an initial raw material, the reaction route is short, the total yield is high, a prote