204448-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204448-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,4,4 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 204448-91:
(8*2)+(7*0)+(6*4)+(5*4)+(4*4)+(3*8)+(2*9)+(1*1)=119
119 % 10 = 9
So 204448-91-9 is a valid CAS Registry Number.
204448-91-9Relevant academic research and scientific papers
Asymmetric desymmetrization of meso-cyclopentitol using a C2-symmetric bis-sulfoxide: A synthesis of (-)-allosamizoline
Maezaki, Naoyoshi,Sakamoto, Atsunobu,Tanaka, Tetsuaki,Iwata, Chuzo
, p. 179 - 182 (2007/10/03)
A synthesis of (-)-allosamizoline was accomplished via asymmetric desymmetrization of a meso-cyclopentitol using the C2-symmetric bis-sulfoxide 5 as a chiral auxiliary.
