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501443-53-4

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501443-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 501443-53-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,1,4,4 and 3 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 501443-53:
(8*5)+(7*0)+(6*1)+(5*4)+(4*4)+(3*3)+(2*5)+(1*3)=104
104 % 10 = 4
So 501443-53-4 is a valid CAS Registry Number.

501443-53-4Downstream Products

501443-53-4Relevant articles and documents

Studies on the chemistry of thienoannelated O,N- and S,N-containing heterocycles. 25 [1]. Synthesis of new imidazolyl and pyrazolyl derivatives of thiophene as inhibitors of nitric oxide synthase

Erker, Thomas,Galanski, Maria E.,Galanski, Markus

, p. 857 - 861 (2007/10/03)

Some novel imidazolyl and pyrazolyl thiophene derivatives were synthesized. Different substituted N-containing heterocycles were chosen with the aim of enhancing the activity or selectivity of the products towards inhibition of one of the three isoforms of nitric oxide synthase. One series of substances was prepared by substitution reactions of 3-bromo-2-nitrothiophene with various heterocycles. In the other series introduction of a second heterocyclic substituent to pyrazolylthiophene compounds was attempted.

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