33457-07-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33457-07-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,4,5 and 7 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 33457-07:
(7*3)+(6*3)+(5*4)+(4*5)+(3*7)+(2*0)+(1*7)=107
107 % 10 = 7
So 33457-07-7 is a valid CAS Registry Number.
33457-07-7Relevant articles and documents
NEW SYNTHESIS OF IMIDAZODIAZEPINE
Ivanov, E. I.,Polishchuk, A. A.,Mazepa, A. V.
, p. 1006 - 1008 (1992)
A new approach has been implemented in the synthesis of imidazodiazepines consisting in the cyclization of 4,5-di(chloromethyl)imidazole by urea derivatives.