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220133-88-0

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220133-88-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220133-88-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,3 and 3 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 220133-88:
(8*2)+(7*2)+(6*0)+(5*1)+(4*3)+(3*3)+(2*8)+(1*8)=80
80 % 10 = 0
So 220133-88-0 is a valid CAS Registry Number.

220133-88-0Relevant articles and documents

Total synthesis of (RS)- And (R)-3-alkanosyl-5-hydroxymethyltetronic acid homologues, HIV-1 protease inhibitory natural products

Yamashita, Masayuki,Murai, Hiromichi,Mittra, Asmita,Yoshioka, Tomomichi,Kawasaki, Ikuo,Gotoh, Mariko,Higashi, Tomoko,Hatsuyama, Rie,Ohta, Shunsaku

, p. 2327 - 2337 (2007/10/03)

5-Acetoxymethyl-γ-butyrolactone-3-carboxylic acids [(RS)-4a and (S)-4a] were prepared as racemic form starting from dibenzyl allylmalonate (5b) and optically active S form starting from (4S)-4-[2,2-bis(benzyloxycarbonyl)ethyl]-2,2-dimethyl-1,3-dioxolane [

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