1557267-50-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1557267-50-1 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 7 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1557267-50:
(9*1)+(8*5)+(7*5)+(6*7)+(5*2)+(4*6)+(3*7)+(2*5)+(1*0)=191
191 % 10 = 1
So 1557267-50-1 is a valid CAS Registry Number.
1557267-50-1Relevant 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