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33513-04-1

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33513-04-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33513-04-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,5,1 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 33513-04:
(7*3)+(6*3)+(5*5)+(4*1)+(3*3)+(2*0)+(1*4)=81
81 % 10 = 1
So 33513-04-1 is a valid CAS Registry Number.

33513-04-1Downstream Products

33513-04-1Relevant articles and documents

SYNTHESIS AND 1,3-DIPOLAR CYCLOADDITIONS OF 2-METHYLENECEPHALOSPORINS

Jaszberenyi J. Csaba,Pitlik Janos,Kollar Katalin,Petrikovics Ilona,Erdoedi-Koever Katalin,Batta Gyula

, p. 81 - 98 (2007/10/02)

Cephalosporin R- and S-sulphoxides were prepared.The S-sulphoxides gave Mannich-reaction resulting in the formation of 2-methylenecephalosporins.These electrom-deficient dienes underwent 1,3-dipolar cycloadditions with diazoalkanes in a chemo- and regiosp

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