Cas 951157-13-4,tetraethyl 1H-pyrrole-2,3,4,5-tetracarboxylate

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Check Digit Verification of cas no

The CAS Registry Mumber 951157-13-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,1,1,5 and 7 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 951157-13:
(8*9)+(7*5)+(6*1)+(5*1)+(4*5)+(3*7)+(2*1)+(1*3)=164
164 % 10 = 4
So 951157-13-4 is a valid CAS Registry Number.

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951157-13-4Relevant articles and documents

[3+2] Cycloaddition of diazocarbonyl compounds to 1,1-dinitroethenes: Synthesis of functionalized gem-dinitrocyclopropanes

Ivanova, Olga A.,Budynina, Ekaterina M.,Averina, Elena B.,Kuznetsova, Tamara S.,Grishin, Yurii K.,Zefirov, Nikolai S.

, p. 2009 - 2013 (2007)

The synthesis of functionalized gem-dinitrocyclopropanes via [3+2] cycloaddition of diazocarbonyl compounds with 1,1-dinitroethenes [in some cases in the presence of Mo(CO)6 as catalyst] has been developed. Georg Thieme Verlag Stuttgart.

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951157-13-4