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20921-11-3

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20921-11-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20921-11-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,2 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20921-11:
(7*2)+(6*0)+(5*9)+(4*2)+(3*1)+(2*1)+(1*1)=73
73 % 10 = 3
So 20921-11-3 is a valid CAS Registry Number.

20921-11-3Relevant articles and documents

Novel chromogenic aminopeptidase substrates for the detection and identification of clinically important microorganisms

Cellier, Marie,James, Arthur L.,Orenga, Sylvain,Perry, John D.,Rasul, Ari K.,Robinson, Shaun N.,Stanforth, Stephen P.

, p. 5249 - 5269 (2014)

A series of amino acid derivatives 8-10, 42 and 43 have been prepared as chromogenic enzyme substrates in order to detect aminopeptidase activity in clinically important Gram-negative and Gram-positive bacteria. Enzymatic hydrolysis liberates the amino ac

Benzophenone Dicarboxylic Acid Antagonists of Leukotriene B4. 1. Structure-Activity Relationships of the Benzophenone Nucleus

Gapinski, D. Mark,Mallett, Barbara E.,Froelich, Larry L.,Jackson, William T.

, p. 2798 - 2807 (2007/10/02)

A series of lipophilic benzophenone dicarboxylic acid derivatives was prepared which inhibited the binding of the potent chemotaxin leukotriene B4 to its receptor(s) on intact human neutrophils.With a radioligand-binding assay as a measure of receptor affinity, a structure-activity relationship for this series was investigated.Both acidic residues were required for receptor-binding activity.The relative orientation of the two acidic groups was important for optimal binding.Replacement of the carbonyl group of the benzophenone with a variety of polar and nonpolar linking groups lead to only small changes in binding affinity, indicating the linking group may not be involved in receptor recognition.Further structure-activity relationships within this series are reported in an accompanying paper.

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