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190838-91-6

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190838-91-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 190838-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,8,3 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 190838-91:
(8*1)+(7*9)+(6*0)+(5*8)+(4*3)+(3*8)+(2*9)+(1*1)=166
166 % 10 = 6
So 190838-91-6 is a valid CAS Registry Number.

190838-91-6Relevant articles and documents

New isoxazolidine-based chiral auxiliaries for asymmetric syntheses

Abiko, Atsushi,Liu, Ji-Feng,Wang, Guo-Qiang,Masamune, Satoru

, p. 3261 - 3264 (2007/10/03)

New chiral auxiliaries based on the bicyclic-isoxazolidine skeleton, 3-oxa-2,7-diazabicylo[3,3,0]octane derivatives, were synthesized in 60-80% overall yields from amino acids. Asymmetric alkylation and boron aldol reaction using the auxiliaries proceeded with high selectivities. 'Carboxylic amide' has been used for the asymmetric boron-mediated aldol reaction for the first time.

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