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327614-74-4

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327614-74-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 327614-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,2,7,6,1 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 327614-74:
(8*3)+(7*2)+(6*7)+(5*6)+(4*1)+(3*4)+(2*7)+(1*4)=144
144 % 10 = 4
So 327614-74-4 is a valid CAS Registry Number.

327614-74-4Relevant articles and documents

Synthesis and cytotoxicity of 4′-C- and 5′-C-substituted toyocamycins

Gunic, Esmir,Girardet, Jean-Luc,Pietrzkowski, Zbigniew,Esler, Cathey,Wang, Guangyi

, p. 163 - 170 (2007/10/03)

Toyocamycin and some analogues have shown potent antitumor activities; however, none of them could be used clinically primarily owing to their cytotoxicity to normal human cells. In order to overcome the weakness of these nucleoside analogues, substitution of a variety of modified sugars for the ribofuranose was explored in our laboratories with expectation that certain sugar-modified toyocamycin analogues may be selectively cytotoxic to cancer cells. In this article, we report synthesis and cytotoxicity of 4′-C- and 5′-C-substituted toyocamycins, which were prepared via the condensations of 4-C- and 5-C-substituted ribofuranose derivatives 11, 12, 13, 20, 21, and 26 with the silylated form of 4-amino-6-bromo-5-cyanopyrrolo[2,3-d]pyrimidine (27) and subsequent debromination and debenzoylation. When compared to the parent toyocamycin, all these analogues showed much lower cytotoxicity to human prostate cancer cells (HTB-81), mouse melanoma cancer cells (B16) as well as normal human fibroblasts. Compound 1e showed a significant cytotoxicity to the prostate cancer cells and a moderate selectivity. The results suggested that sugar modifications, especially those that may affect phosphorylation of nucleosides, could alter cytotoxicity profile significantly.

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