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37591-56-3

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37591-56-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 37591-56-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,7,5,9 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 37591-56:
(7*3)+(6*7)+(5*5)+(4*9)+(3*1)+(2*5)+(1*6)=143
143 % 10 = 3
So 37591-56-3 is a valid CAS Registry Number.

37591-56-3Relevant articles and documents

A practical method for synthesis of penicillin and cephalosporin sulfoxides

Tanaka,Konoike,Yoshioka

, p. 197 - 198 (2007/10/02)

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Process for the preparation of esters of N-blocked penicillin acids which comprises reacting the acid or a salt thereof with a primary amine and a nitrosating agent

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, (2008/06/13)

A process is described for the preparation of esters of N-blocked amino acids (such as penicillins or cephalosporins) wherein the amino acid or a salt thereof is reacted with a primary amine and nitrosating agent.

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