81924-49-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81924-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,2 and 4 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 81924-49:
(7*8)+(6*1)+(5*9)+(4*2)+(3*4)+(2*4)+(1*9)=144
144 % 10 = 4
So 81924-49-4 is a valid CAS Registry Number.
81924-49-4Relevant articles and documents
Avermectin Acyl Derivatives with Anthelmintic Activity
Mrozik, Helmut,Eskola, Philip,Fisher, Michael H.,Egerton, John R.,Cifelli, Sam,Ostlind, Dan A.
, p. 658 - 663 (1982)
Avermectins A2a, B1a, and B2a (1, 2, and 3) were acetylated to give 4''- and 23-acetates 4 and 5 and 4'',23-diacetate 6 from 1, the 4''- and 5-acetates 7 and 8 and 4'',5-diacetate 9 from 2, and triacetate 10 from 3.Structu
