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55722-54-8

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55722-54-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55722-54-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,7,2 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 55722-54:
(7*5)+(6*5)+(5*7)+(4*2)+(3*2)+(2*5)+(1*4)=128
128 % 10 = 8
So 55722-54-8 is a valid CAS Registry Number.

55722-54-8Relevant articles and documents

Synthesis and preliminary biological evaluation of 3′-substituted cephem sulfones as potential β-lactamase inhibitors

De Angelis, Francesco,Attorrese, Giuseppe,Cavicchio, Giancarlo,Ciampa, Sabatino,Tullio, Alessandra Di,Fattori, Daniela,Nicoletti, Rosario,Domenici, Enrico

, p. 3075 - 3081 (2007/10/03)

3′-Substituted cephem sulfones, as well as the unsubstituted congener, were synthesized and biologically evaluated as βlactamase inhibitors. Sodium 3′-substituted cephalosporanate sulfones 4 and 5 were prepared starting from 7-aminodeacetoxycephalosporani

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