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74580-97-5

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74580-97-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74580-97-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,5,8 and 0 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 74580-97:
(7*7)+(6*4)+(5*5)+(4*8)+(3*0)+(2*9)+(1*7)=155
155 % 10 = 5
So 74580-97-5 is a valid CAS Registry Number.

74580-97-5Downstream Products

74580-97-5Relevant articles and documents

Nucleosides. 116. 1-(β-D-Xylofuranosyl)-5-fluorocytosines with a Leaving Group on the 3' Position. Potential Double-Barreled Masked Precursors of Anticancer Nucleosides

Watanabe, K. A.,Reichman, U.,Chu, C. K.,Hollenberg, D. H.,Fox, J. J.

, p. 1088 - 1094 (2007/10/02)

Syntheses of five pairs of cytosine and 5-fluorocytosine xylofuranosyl nucleosides in which the 3'-hydroxyl group is replaced by Cl, Br, I, OMs, or OTs are described.Those xylosyl nucleosides with a good leaving group at the 3' position exhibit good inhibitory activity against L5178Y and P815 mouse leukemic cells in vitro at rather low concentrations, and like that of ara-C this cytotoxicity is reversed by 2'-deoxycytidine but not by thymidine.Xylosylcytosines are not active against ara-C resistant lines of L5178Y and P815 cells; however the corresponding 5-fluorocytosine analogues exhibit significant cytotoxicity against these ara-C resistant leukemic cell lines, and this activity is reversed by thymidine but not by deoxycytidine.These data support the "double-barreled" masked precursor hypothesis in that xylosyl-5-fluorocytosines substituted at the 3' position by a good leaving group exhibit activity akin to that of ara-C in the ara-C in the ara-C sensitive lines, while these nucleosides act as 5-fluoropyrimidines in the ara-C resistant lines.

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