81244-83-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81244-83-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,4 and 4 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81244-83:
(7*8)+(6*1)+(5*2)+(4*4)+(3*4)+(2*8)+(1*3)=119
119 % 10 = 9
So 81244-83-9 is a valid CAS Registry Number.
81244-83-9Relevant articles and documents
APPLICATION OF ACETOXYMETHYL ESTERS OF PENICILLINS FOR PREPARATION OF 7-AMINO-DESACETOXY-CEPHALOSPORANIC ACID (7-ADCA)
Gruszecki, Wojciech,Gdulewicz-Gruszecka, Maria,Borowski, Edward
, p. 1675 - 1679 (2007/10/02)
A simple method of preparing 7-amino-desacetoxy-cephalosporanic acid (7-ADCA) from acetoxymethyl esters of natural penicillins has been described.
