Cas 21802-59-5,1-Ethyl-3,7,9-trimethyl-harnsaeure

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Check Digit Verification of cas no

The CAS Registry Mumber 21802-59-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,0 and 2 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21802-59:
(7*2)+(6*1)+(5*8)+(4*0)+(3*2)+(2*5)+(1*9)=85
85 % 10 = 5
So 21802-59-5 is a valid CAS Registry Number.

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21802-59-5Relevant academic research and scientific papers

Cu-Catalyzed C-H Activation Reaction: One-Pot Direct Synthesis of Xanthine and Uric Acid Derivatives from 5-Bromouracil

Hazra, Somjit,Mondal, Biplab,Roy, Brindaban,Rahaman, Habibur

, p. 1757 - 1761 (2021)

A one-pot direct synthesis of xanthine and uric acid derivates is reported. This simple yet efficient methodology illustrates concurrent formation of two C-N bonds using CuBr 2as catalyst and one of those C-N bonds is formed by uracil C6-H bond activation.

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