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1321531-36-5

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1321531-36-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1321531-36-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,2,1,5,3 and 1 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1321531-36:
(9*1)+(8*3)+(7*2)+(6*1)+(5*5)+(4*3)+(3*1)+(2*3)+(1*6)=105
105 % 10 = 5
So 1321531-36-5 is a valid CAS Registry Number.

1321531-36-5Relevant articles and documents

Design of HIV-1 protease inhibitors with C3-substituted hexahydrocyclopentafuranyl urethanes as P2-ligands: Synthesis, biological evaluation, and protein-ligand X-ray crystal structure

Ghosh, Arun K.,Chapsal, Bruno D.,Parham, Garth L.,Steffey, Melinda,Agniswamy, Johnson,Wang, Yuan-Fang,Amano, Masayuki,Weber, Irene T.,Mitsuya, Hiroaki

, p. 5890 - 5901 (2011/10/08)

We report the design, synthesis, biological evaluation, and the X-ray crystal structure of a novel inhibitor bound to the HIV-1 protease. Various C3-functionalized cyclopentanyltetrahydrofurans (Cp-THF) were designed to interact with the flap Gly48 carbonyl or amide NH in the S2-subsite of the HIV-1 protease. We investigated the potential of those functionalized ligands in combination with hydroxyethylsulfonamide isosteres. Inhibitor 26 containing a 3-(R)-hydroxyl group on the Cp-THF core displayed the most potent enzyme inhibitory and antiviral activity. Our studies revealed a preference for the 3-(R)-configuration over the corresponding 3-(S)-derivative. Inhibitor 26 exhibited potent activity against a panel of multidrug-resistant HIV-1 variants. A high resolution X-ray structure of 26-bound HIV-1 protease revealed important molecular insight into the ligand-binding site interactions.

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