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1278444-56-6

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1278444-56-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1278444-56-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,8,4,4 and 4 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1278444-56:
(9*1)+(8*2)+(7*7)+(6*8)+(5*4)+(4*4)+(3*4)+(2*5)+(1*6)=186
186 % 10 = 6
So 1278444-56-6 is a valid CAS Registry Number.

1278444-56-6Relevant articles and documents

An efficient synthesis of the precursor of AI-2, the signalling molecule for inter-species quorum sensing

Ascenso, Osvaldo S.,Marques, Jo?o C.,Santos, Ana Rita,Xavier, Karina B.,Rita Ventura,Maycock, Christopher D.

, p. 1236 - 1241 (2011/03/22)

Autoinducer-2 (AI-2) is a signalling molecule for bacterial inter-species communication. A synthesis of (S)-4,5-dihydroxypentane-2,3-dione (DPD), the precursor of AI-2, is described starting from methyl glycolate. The key step was an asymmetric reduction of a ketone with (S)-Alpine borane. This new method was highly reproducible affording DPD for biological tests without contaminants. The biological activity was tested with the previously available assays and compared with a new method using an Escherichia coli reporter strain thus avoiding the use of the pathogenic Salmonella reporter.

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