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177933-51-6

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177933-51-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177933-51-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,3 and 3 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 177933-51:
(8*1)+(7*7)+(6*7)+(5*9)+(4*3)+(3*3)+(2*5)+(1*1)=176
176 % 10 = 6
So 177933-51-6 is a valid CAS Registry Number.

177933-51-6Relevant articles and documents

Resolution of cis-2-fluorocyclopropanecarboxylic acid by a microbial enantioselective hydrolysis

Imura, Akihiro,Itoh, Motohiro,Miyadera, Akihiko

, p. 3047 - 3052 (1998)

The important key intermediate of quinolone analogue synthesis, (1S,2S)- 2-fluorocyclopropanecarboxylic acid, was prepared enantioselectively by a microbial resolution. One of the strains with the highest enzymatic specificity was selected from soil and when lyophilized cells were treated with corresponding ester, the remaining (1S,2S)-ester was obtained with high enantiomeric purity (98% e.e.).

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