57691-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57691-11-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,6,9 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57691-11:
(7*5)+(6*7)+(5*6)+(4*9)+(3*1)+(2*1)+(1*1)=149
149 % 10 = 9
So 57691-11-9 is a valid CAS Registry Number.
57691-11-9Relevant academic research and scientific papers
3-(Substituted) vinyl cephalosporins
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, (2008/06/13)
New 3-(substituted) vinyl cephalosporin compounds, e.g., 3-(2'-ethoxycarbonylvinyl)-7-phenoxyacetamido-3-cephem-4-carboxylic acid, which are useful as antibiotics, and 3-(substituted) vinyl cephalosporin compounds which are useful as intermediates in preparing antibiotic substances.
