207989-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 207989-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,9,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 207989-91:
(8*2)+(7*0)+(6*7)+(5*9)+(4*8)+(3*9)+(2*9)+(1*1)=181
181 % 10 = 1
So 207989-91-1 is a valid CAS Registry Number.
207989-91-1Relevant academic research and scientific papers
Method for producing ketocarboxylic acid derivatives
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Page/Page column 9, (2010/02/03)
A novel process affords ω-ketocarboxylic acid derivatives of the formula (I) in which R1, R2, R3, and n are as defined in the description by reaction of compounds of the formula (II) with compounds of the formula (III) or
