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731002-39-4

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731002-39-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 731002-39-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,3,1,0,0 and 2 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 731002-39:
(8*7)+(7*3)+(6*1)+(5*0)+(4*0)+(3*2)+(2*3)+(1*9)=104
104 % 10 = 4
So 731002-39-4 is a valid CAS Registry Number.

731002-39-4Relevant articles and documents

Conjoint molecules of cephalosporins and aminoglycosides

Grapsas, Ioannis,Lerner, Stephen A.,Mobashery, Shahriar

, p. 295 - 301 (2007/10/03)

A general synthetic route to conjoint molecules of cephalosporins and aminoglycosides is described. These molecules were designed as potential substrates for bacterial β-lactamases, enzymes that hydrolyze the β-lactam bond of cephalosporins. Hydrolysis of the β-lactam bond was expected to release the C10-appended aminoglycoside. Since β-lactamases are sequestered in the periplasmic space of gram-negative bacteria, this sequence of events would liberate aminoglycoside inside such bacteria. It is expected that such local delivery of aminoglycosides would circumvent the inherent toxicity of aminoglycosides that occurs during systemic exposure within the mammalian host.

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