133053-61-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133053-61-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,0,5 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133053-61:
(8*1)+(7*3)+(6*3)+(5*0)+(4*5)+(3*3)+(2*6)+(1*1)=89
89 % 10 = 9
So 133053-61-9 is a valid CAS Registry Number.
133053-61-9Relevant articles and documents
CYCLIZATION OF VICINAL ACETYLENIC DERIVATIVES OF PYRAZOLECARBONAMIDES AND BENZAMIDES
Vasilevskii, S. F.,Shvartsberg, M. S.
, p. 1901 - 1905 (2007/10/02)
Vicinal acetylenic derivatives of pyrazolecarbonamides and benzamides cyclize in alcoholic solution in the presence of KOH with closure of the six- or five-membered lactam ring.The formation of γ-lactam (from o-phenylethynylbenzamide) has been noted for t
