206532-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 206532-57-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,5,3 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 206532-57:
(8*2)+(7*0)+(6*6)+(5*5)+(4*3)+(3*2)+(2*5)+(1*7)=112
112 % 10 = 2
So 206532-57-2 is a valid CAS Registry Number.
206532-57-2Relevant articles and documents
Synthesis of (+)- and (-)-ethosuximides utilizing asymmetric nitroolefination
Nishide, Kiyoharu,Katoh, Takahiro,Imazato, Hitoshi,Node, Manabu
, p. 839 - 845 (2007/10/03)
Both enantiomers of ethosuximide were synthesized from (S)-(-)- and (R)-(+)-2-methyl-2-[(E)-2-nitroethenyl]-γ-butyrolactones (1), which were obtained by asymmetric nitroolefination of α-methyl-γ-butyrolactone, via the lactone carboxylic acid (3).
