109991-16-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109991-16-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,9 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 109991-16:
(8*1)+(7*0)+(6*9)+(5*9)+(4*9)+(3*1)+(2*1)+(1*6)=154
154 % 10 = 4
So 109991-16-4 is a valid CAS Registry Number.
109991-16-4Relevant academic research and scientific papers
6-(1-ACYL-1-HYDROXYMETHYL)PENICILLANIC ACID DERIVATIVES
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, (2008/06/13)
6-(1-Acyl-1-hydroxymethyl)penicillanic acid derivatives are useful as antibacterials and/or beta-lactamase inhibitors.