73845-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73845-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,8,4 and 5 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 73845-19:
(7*7)+(6*3)+(5*8)+(4*4)+(3*5)+(2*1)+(1*9)=149
149 % 10 = 9
So 73845-19-9 is a valid CAS Registry Number.
73845-19-9Relevant academic research and scientific papers
The Penems, a New Class of β-Lactam Antibiotics. 5. Total Synthesis of Racemic 6-α-Hydroxyethylpenemcarboxylic Acids
Pfaendler, H. R.,Gosteli, J.,Woodward R. B.
, p. 2039 - 2043 (2007/10/02)
The novel racemic threo-trans-6-α-hydroxyethylpenem-3-carboxylic acid 3t and its erythro-trans isomer 3e have been prepared over 13 steps from acetoxyazetidinone 4.
