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21572-56-5

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21572-56-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21572-56-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,7 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21572-56:
(7*2)+(6*1)+(5*5)+(4*7)+(3*2)+(2*5)+(1*6)=95
95 % 10 = 5
So 21572-56-5 is a valid CAS Registry Number.

21572-56-5Downstream Products

21572-56-5Relevant articles and documents

Synthesis and antitumor activity of novel pyridino[2,3-d]pyrimidine urea derivatives

Chen, Dongmei,Chen, Yumei,Yang, Di,Zheng, Zhaopeng,Zhou, Zhixu

, p. 1628 - 1636 (2021/05/19)

A series of novel N-(3-((6-bromopyrido[2,3-d]pyrimidin-4-yl)oxy)phenyl)pyrrolidine-1-carboxamide and 1-(3-((6-bromopyrido[2,3-d]pyrimidin-4-yl)oxy)phenyl)-3-propylurea derivatives were synthesized. Their antitumor activities against human breast carcinoma cells (MCF-7) and human colon cancer cells (HCT-116) in vitro were evaluated, using sorafenib as a positive control drug. Anticancer bioassays indicated that several compounds exhibited appreciable anticancer activity against MCF-7 and HCT-116 cells. Particularly, compounds 9g and 8b demonstrated the most significant inhibitory effect against HCT-116 and MCF-7 cells, with inhibition ratios of 25.56% and 26.46%, respectively. Additionally, the synthesized pyridine[2,3-d]pyrimidine derivatives containing a urea group moieties exhibited antitumor activities against MCF-7 and HCT-116 cells in vitro.

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