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191283-12-2

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191283-12-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191283-12-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,2,8 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 191283-12:
(8*1)+(7*9)+(6*1)+(5*2)+(4*8)+(3*3)+(2*1)+(1*2)=132
132 % 10 = 2
So 191283-12-2 is a valid CAS Registry Number.

191283-12-2Relevant articles and documents

Hemi-synthesis and biological activity of new analogues of podophyllotoxin

Roulland, Emmanuel,Magiatis, Prokopios,Arimondo, Paola,Bertounesque, Emmanuel,Monneret, Claude

, p. 3463 - 3471 (2007/10/03)

Various 4-analogues of podophyllotoxin and epipodophyllotoxin were obtained via the formation of the corresponding 4-keto derivatives. Methyloximation of podophyllotoxone, followed by subsequent catalytic hydrogenation, gave stereoselective access to 4-α-amino-4-deoxypodophyllotoxin and from there, to the corresponding acetamido and formamido derivatives. Base-catalyzed isomerisation of 4-α-amino-4-deoxypodophyllotoxin led to the corresponding picropodophyllin isomer while the 4-β-amino afforded a neopodophyllotoxin-like derivative. On the other hand, oxirane and hydroxymethyl-containing analogues were prepared from podophyllotoxin and 4-epi-4′-demethyl-podophyllotoxin, using a Takai olefination strategy. In the latter series, carboxaldehyde- and carboxylic acid-containing derivatives were also synthesized.

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