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136341-16-7

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136341-16-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136341-16-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,3,4 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 136341-16:
(8*1)+(7*3)+(6*6)+(5*3)+(4*4)+(3*1)+(2*1)+(1*6)=107
107 % 10 = 7
So 136341-16-7 is a valid CAS Registry Number.

136341-16-7Relevant articles and documents

Synthesis of tricyclic quinolones and naphthyridones by intramolecular heck cyclization of functionalized electron-rich heterocycles

Beccalli, Egle M.,Broggini, Gianluigi,Martinelli, Michela,Paladino, Giuseppe,Zoni, Caterina

, p. 2091 - 2096 (2007/10/03)

Starting from commercially available pyrrole- and thiophene-2-carboxylic acids 1 or thiophene- and furan-3-carboxylic acids 6, we report the synthesis of tricyclic fused quinolone and naphthyridone derivatives, in only three steps, by an intramolecular He

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