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1639431-05-2

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1639431-05-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1639431-05-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,9,4,3 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1639431-05:
(9*1)+(8*6)+(7*3)+(6*9)+(5*4)+(4*3)+(3*1)+(2*0)+(1*5)=172
172 % 10 = 2
So 1639431-05-2 is a valid CAS Registry Number.

1639431-05-2Downstream Products

1639431-05-2Relevant articles and documents

Structure-Activity relationship study of sesquiterpene lactones and their semi-synthetic amino derivatives as potential antitrypanosomal products

Zimmermann, Stefanie,Fouche, Gerda,De Mieri, Maria,Yoshimoto, Yukiko,Usuki, Toyonobu,Nthambeleni, Rudzani,Parkinson, Christopher J.,Van Der Westhuyzen, Christiaan,KaiserB, Marcel,Hamburger, Matthias,Adams, Michael

, p. 3523 - 3538 (2014/04/17)

Sesquiterpene lactones (STLs) are natural products that have potent antitrypanosomal activity in vitro and, in the case of cynaropicrin, also reduce parasitemia in the murine model of trypanosomiasis. To explore their structure-Antitrypanosomal activity relationships, a set of 34 natural and semi-synthetic STLs and amino-STLs was tested in vitro against T. b. rhodesiense (which causes East African sleeping sickness) and mammalian cancer cells (rat bone myoblast L6 cells). It was found that the a-methylene-?- lactone moiety is necessary for both antitrypanosomal effects and cytotoxicity. Antitrypanosomal selectivity is facilitated by 2-(hydroxymethyl)acrylate or 3,4-dihydroxy-2- methylenebutylate side chains, and by the presence of cyclopentenone rings. Semi-synthetic STL amines with morpholino and dimethylamino groups showed improved in vitro activity over the native STLs. The dimethylamino derivative of cynaropicrin was prepared and tested orally in the T. b. rhodesiense acute mouse model, where it showed reduced toxicity over cynaropicrin, selectivity is facilitated by 2-(hydroxymethyl)acrylate or 3,4-dihydroxy-2-methylenebutylate side chains, and by the presence of cyclopentenone rings. Semi-synthetic STL amines with morpholino and dimethylamino groups showed improved in vitro activity over the native STLs. The dimethylamino derivative of cynaropicrin was prepared and tested orally in the T. b. rhodesiense acute mouse model, where it showed reduced toxicity over cynaropicrin, but also lost antitrypanosomal activity.

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