128624-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128624-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,2 and 4 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128624-91:
(8*1)+(7*2)+(6*8)+(5*6)+(4*2)+(3*4)+(2*9)+(1*1)=139
139 % 10 = 9
So 128624-91-9 is a valid CAS Registry Number.
128624-91-9Relevant academic research and scientific papers
An Efficient and Stereoselective Synthesis of the 1β-Methylcarbapenem Key Precursor
Honda, Toshio,Wang, Tzu-Chueh,Chu, Shih-Der
, p. 531 - 534 (2007/10/02)
The key precursor for the preparation of 1β-methylcarbapenem antibiotic was stereoselectively synthesized from (+)-4-acetoxy-3--2-azetidinone by employing an intermolecular carbenoid displacement reaction as a key ste
