190520-75-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190520-75-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,5,2 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 190520-75:
(8*1)+(7*9)+(6*0)+(5*5)+(4*2)+(3*0)+(2*7)+(1*5)=123
123 % 10 = 3
So 190520-75-3 is a valid CAS Registry Number.
190520-75-3Relevant articles and documents
Processes for preparing aminophenylsulfonylureas, and intermediates therefor
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, (2008/06/13)
The invention relates to the preparation of compounds (I) in which A=H or acyl and R1, R21, R3, R, n, X, Y and Z are as defined in claim 1 by halogenation and rearrangement of compounds (II) (optionally salt) to
