157309-47-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157309-47-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,3,0 and 9 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 157309-47:
(8*1)+(7*5)+(6*7)+(5*3)+(4*0)+(3*9)+(2*4)+(1*7)=142
142 % 10 = 2
So 157309-47-2 is a valid CAS Registry Number.
157309-47-2Relevant academic research and scientific papers
Goniobutenolides A and B: Serendipitous Syntheses, Relative and Absolute Configuration
Shing, Tony K. M.,Tai, Vincent W.-F.,Tsui, Hon-Chung
, p. 1293 - 1294 (2007/10/02)
The relative and absolute stereochemistries of natural goniobutenolides A and B are established as 1 and 2 respectively by short syntheses of them and their 8-epimers.
