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209258-91-3

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209258-91-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209258-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,2,5 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 209258-91:
(8*2)+(7*0)+(6*9)+(5*2)+(4*5)+(3*8)+(2*9)+(1*1)=143
143 % 10 = 3
So 209258-91-3 is a valid CAS Registry Number.

209258-91-3Relevant articles and documents

Synthesis of dipeptide-type human immunodeficiency virus (HIV) protease inhibitors with a binding unit to GP120

Asagarasu, Akira,Takayanagi, Nao,Achiwa, Kazuo

, p. 867 - 870 (2007/10/03)

Some dipeptide-type human immunodeficiency virus (HIV) protease inhibitors derived from KNI-102, with a N-carbomethoxycarbonylprolyl- phenylalanine benzyl ester (CPF) moiety as a binding site to gp120, were synthesized. Compounds 11a showed 7 - 100 times higher HIV protease- inhibitory activity (11a; IC50 = 0.90 μg/ml, 1.1 μM) than the standard compound 3 or 4 (3; IC50 = 3.7 μg/ml, 7.7 μM, 4; IC50 = 75 μg/ml, 155 μM). Generally, the compounds substituted at the o-position of the phenoxyacetyl group 7a, 11a, 16a and 21a showed several times higher inhibitory activity than 3.

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