217439-34-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217439-34-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,3 and 9 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 217439-34:
(8*2)+(7*1)+(6*7)+(5*4)+(4*3)+(3*9)+(2*3)+(1*4)=134
134 % 10 = 4
So 217439-34-4 is a valid CAS Registry Number.
217439-34-4Relevant academic research and scientific papers
Enantioselective synthesis of the (5S, 6R, 9R) and (5S, 6R, 9S) analogs of lactacystin β-lactone
Corey,Li, Wei-Dong Z.
, p. 8043 - 8046 (2007/10/03)
The synthesis of two diastereomers of lactacystin β-lactone (2), the β-lactones 3 and 4, is described.
