340819-92-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 340819-92-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,0,8,1 and 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 340819-92:
(8*3)+(7*4)+(6*0)+(5*8)+(4*1)+(3*9)+(2*9)+(1*2)=143
143 % 10 = 3
So 340819-92-3 is a valid CAS Registry Number.
340819-92-3Relevant academic research and scientific papers
Synthesis of an intermediate for A-ring of 19-nor-1α, 25-dihydroxyvitamin D3 analogues
Wu,Guan,Ji,Cheng
, p. 136 - 138 (2007/10/03)
An optically active intermediate 5b for the A-ring of 19-nor-1α,25-dihydroxyvitamin D3 analogues has been synthesized in 9 steps, starting from readily available, inexpensive D(+)-xylose with good yield and cheap reagents.
