920739-17-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 920739-17-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,2,0,7,3 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 920739-17:
(8*9)+(7*2)+(6*0)+(5*7)+(4*3)+(3*9)+(2*1)+(1*7)=169
169 % 10 = 9
So 920739-17-9 is a valid CAS Registry Number.
920739-17-9Relevant articles and documents
PREPARATION OF MONTELUKAST AND ITS SALTS
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Page/Page column 38-41, (2008/12/05)
There is provided a process for the preparation of montelukast of the Formula (I).