91685-69-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91685-69-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,8 and 5 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91685-69:
(7*9)+(6*1)+(5*6)+(4*8)+(3*5)+(2*6)+(1*9)=167
167 % 10 = 7
So 91685-69-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H9NO4S/c1-3(10)5-6(11)9-4(8(12)13)2-14-7(5)9/h2-3,5,7,10H,1H3,(H,12,13)/t3-,5-,7-/m1/s1
91685-69-7Relevant 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.
