55331-32-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55331-32-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,3,3 and 1 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 55331-32:
(7*5)+(6*5)+(5*3)+(4*3)+(3*1)+(2*3)+(1*2)=103
103 % 10 = 3
So 55331-32-3 is a valid CAS Registry Number.
55331-32-3Relevant articles and documents
7-Acylamino-3-acyl-2(or 3)cephems
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, (2008/06/13)
Intermediate C-3 1-hydroxyalkyl or 1-hydroxyarylalkyl cephems, prepared by reacting Grignard reagents at low temperature with 3-formyl-2-cephem compounds, are oxidized to the corresponding 7-acylamino-3-acyl-2(or 3)cephem-4-carboxylic acids and esters thereof, which are useful as antibiotics or as intermediates in preparing antibiotic substances.