The CAS Registry Mumber 51727-23-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,7,2 and 7 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 51727-23: (7*5)+(6*1)+(5*7)+(4*2)+(3*7)+(2*2)+(1*3)=112 112 % 10 = 2 So 51727-23-2 is a valid CAS Registry Number.
Synthesis of heterocyclic 1,4-dihydropyridylacetic acid derivatives of 6-aminopenicillanic acid and D-α-aminobenzylpenicillin with antibacterial activity
Dubey,Knaus
, p. 559 - 580 (2007/10/02)
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