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52134-45-9

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52134-45-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52134-45-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,3 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 52134-45:
(7*5)+(6*2)+(5*1)+(4*3)+(3*4)+(2*4)+(1*5)=89
89 % 10 = 9
So 52134-45-9 is a valid CAS Registry Number.

52134-45-9Relevant articles and documents

Synthesis and structure-activity relationships of new β-adrenoreceptor antagonists. Evidence for the electrostatic requirements for β-adrenoreceptor antagonists

Kettmann,Csollei,Racanska,Svec

, p. 843 - 851 (2007/10/02)

A series of mono- and disubstituted phenoxypropanolamines, structurally related to practolol and acebutolol, has been synthesized and tested for β-adrenoreceptor blocking activity. Structure-activity relationships are discussed. The reasons for the lack of activity of compounds 3n and 4n have also been examined. The results suggest that the negative electrostatic potential above the phenyl ring of phenoxypropanolamines is essential for binding activity and point to the presence of an electropositive residue in the β-adrenoreceptor binding site.

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