195731-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 195731-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,5,7,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 195731-40:
(8*1)+(7*9)+(6*5)+(5*7)+(4*3)+(3*1)+(2*4)+(1*0)=159
159 % 10 = 9
So 195731-40-9 is a valid CAS Registry Number.
195731-40-9Relevant academic research and scientific papers
Bidirectional and convergent routes to oligo(tetrahydrofurans)
Koert, Ulrich,Stein, Matthias,Wagner, Holger
, p. 1170 - 1180 (2007/10/03)
Oligo(tetrahydrofurans) (oligo-THFs) 8-12 have been synthesised stereoselectively. Multiple Williamson reactions were used as key steps. While oligo-THFs with an even number of THF rings like the bi-THFs 8 and 9 as well as the tetra-THFs 10 and 11 were ob
