Cas 1628817-39-9,C19H15N7O

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Check Digit Verification of cas no

The CAS Registry Mumber 1628817-39-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,8,8,1 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1628817-39:
(9*1)+(8*6)+(7*2)+(6*8)+(5*8)+(4*1)+(3*7)+(2*3)+(1*9)=199
199 % 10 = 9
So 1628817-39-9 is a valid CAS Registry Number.

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1628817-39-9Relevant academic research and scientific papers

6-Carbohydrazonamidepurines: Convenient precursors for 4,8-disubstituted pyrimido[5,4-d]pyrimidines

Rocha, Ashly,Bacelar, Ana H.,Fernandes, Joana,Proenca, M. Fernanda,Carvalho, M. Alice

, p. 343 - 348 (2014/03/21)

A series of 4-arylamino-8-(alkyl or aryl)hydrazidepyr?imido[5,4-d] pyrimidines was obtained efficiently from 6-carbo?hydrazonamidepurines by reaction with piperidine. The 6-carbo-?hydrazonamidepurines were generated selectively by the reaction of 6-imidatopurine with hydrazides under acidic conditions. Georg Thieme Verlag Stuttgart New York.

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