61335-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 61335-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,1,3,3 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 61335-91:
(7*6)+(6*1)+(5*3)+(4*3)+(3*5)+(2*9)+(1*1)=109
109 % 10 = 9
So 61335-91-9 is a valid CAS Registry Number.
61335-91-9Relevant academic research and scientific papers
Method of preparation of 3-methylenecephams
-
, (2008/06/13)
Penicillin sulfoxide derived azetidinone sulfinyl chlorides and related sulfinic acid derivatives are cyclized to 3-methylenecephams by reaction with Friedel-Crafts catalysts or metathetic cation forming agents.
