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539821-21-1

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539821-21-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 539821-21-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,3,9,8,2 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 539821-21:
(8*5)+(7*3)+(6*9)+(5*8)+(4*2)+(3*1)+(2*2)+(1*1)=171
171 % 10 = 1
So 539821-21-1 is a valid CAS Registry Number.

539821-21-1Relevant articles and documents

Acid cyclization of amino-substituted heterocycles. Synthesis of 1,3-dioxo- pyrrolo[3,4-c]- and thieno[3,4-c]isoquino- lines and cinnolines

Zinchenko,Efimenko,Suikov,Kobrakov,Bogza

scheme or table, p. 365 - 369 (2011/06/10)

The reaction of 3-amino-4-(3,4-dimethoxyphenyl)maleimide and the methyl esters of 3-amino-4-(3,4-dimethoxyphenyl)-5-R-thiophene-2-carboxylic acids with carbonyl compounds and nitrous acid has been investigated. Dioxopyrrolo[3,4-c]- and thieno[3,4-c]isoqui

Design, synthesis and antiproliferative activity of tripentones: A new series of antitubulin agents

Lisowski, Vincent,Enguehard, Cecile,Lancelot, Jean-Charles,Caignard, Daniel-Henri,Lambel, Stephanie,Leonce, Stephane,Pierre, Alain,Atassi, Ghanem,Renard, Pierre,Rault, Sylvain

, p. 2205 - 2208 (2007/10/03)

Structure-activity relationship studies of a new series of tripentones (thieno[2,3-b]pyrrolizin-8-ones), led us to prepare several derivatives with antiproliferative activities. The most promising 3-(3-hydroxy-4-methoxyphenyl)thieno[2,3-b]pyrrolizin-8-one 20 (leukemia L1210, IC50 = 15 nM) was shown to be a potent inhibitor of tubulin polymerization.

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