247137-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 247137-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,7,1,3 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 247137-89:
(8*2)+(7*4)+(6*7)+(5*1)+(4*3)+(3*7)+(2*8)+(1*9)=149
149 % 10 = 9
So 247137-89-9 is a valid CAS Registry Number.
247137-89-9Relevant academic research and scientific papers
Synthesis of the C-ring fragment of cobyric acid
Mulzer, Johann,Riether, Doris
, p. 6197 - 6199 (2007/10/03)
An efficient stereocontrolled synthesis of the C-ring fragment of cobyric acid 1 is described. The key step is an auxiliary controlled conjugate addition of vinyl cuprate to (5S)-menthyloxy-2[5H]-furanone 3.
