52540-23-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 52540-23-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,5,4 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 52540-23:
(7*5)+(6*2)+(5*5)+(4*4)+(3*0)+(2*2)+(1*3)=95
95 % 10 = 5
So 52540-23-5 is a valid CAS Registry Number.
52540-23-5Relevant articles and documents
3-α-Substituted cephalosporins
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, (2008/06/13)
Novel cephalosporin compounds having a 3'-α-methyl, a 3-aryl or 3-heterocycle substituent are prepared by total synthesis. The novel cephalosporin compounds are active against gram-negative and gram-positive microorganisms.