128949-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128949-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,4 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128949-31:
(8*1)+(7*2)+(6*8)+(5*9)+(4*4)+(3*9)+(2*3)+(1*1)=165
165 % 10 = 5
So 128949-31-5 is a valid CAS Registry Number.
128949-31-5Relevant academic research and scientific papers
Synthesis of α- and β-D,L-ribo-carbahex-2-ulofuranose
Marschner,Penn,Griengl
, p. 5067 - 5078 (2007/10/02)
Both α- and β-D,L-ribo-carbahex-2-ulofuranose have been synthesized in racemic form starting from norbornen-2-one. In the course of the synthesis the reaction of sulfur ylides with α-alkoxyketones took an unexpected stereochemical pathway.
