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174740-20-6

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174740-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 174740-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,4,7,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 174740-20:
(8*1)+(7*7)+(6*4)+(5*7)+(4*4)+(3*0)+(2*2)+(1*0)=136
136 % 10 = 6
So 174740-20-6 is a valid CAS Registry Number.

174740-20-6Relevant articles and documents

Betulinic acid derivatives: A new class of specific inhibitors of human immunodeficiency virus type 1 entry

Soler, Fran?oise,Poujade, Christèle,Evers, Michel,Carry, Jean-Christophe,Hénin, Yvette,Bousseau, Anne,Huet, Thierry,Pauwels, Rudi,De Clercq, Erik,Mayaux, Jean-Fran?ois,Le Pecq, Jean-Bernard,Dereu, Norbert

, p. 1069 - 1083 (2007/10/03)

A novel series of ω-aminoalkanoic acid derivatives of betulinic acid were synthesized and evaluated for their activity against human immunodeficiency virus (HIV). The anti-HIV-1 activity of several members of this new series was found to be in the nanomolar range in CEM 4 and MT-4 cell cultures. The optimization of the ω-aminoalkanoic acid side chain is described. The presence of an amide function within the side chain was found important for optimal activity. RPR 103611 (14g), a statine derivative, was found to be inactive against HIV-1 protease, reverse transcriptase, and integrase as well as on gp120/CD4 binding. 'Time of addition' experiments suggested interaction with an early step of HIV-1 replication. As syncytium formation, but not virus-cell binding, seems to be affected, betulinic acid derivatives are assumed to interact with the postbinding virus-cell fusion process.

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