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83558-06-9

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83558-06-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83558-06-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,5,5 and 8 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 83558-06:
(7*8)+(6*3)+(5*5)+(4*5)+(3*8)+(2*0)+(1*6)=149
149 % 10 = 9
So 83558-06-9 is a valid CAS Registry Number.

83558-06-9Relevant articles and documents

Synthesis and Mass Spectrometry of 4-Oxo-4,5,6,7-tetrahydroindole and 4-Oxo-4,5,6,7-tetrahydrobenzofuran Derivatives

Dagher, C.,Hanna, R.,Terentiev, P. B.,Boundel, Y. G.,Kost, A. N.,Maksimov, B. I.

, p. 645 - 647 (2007/10/02)

We describe in this communication the synthesis and mass spectrometry of some 1-aryl-2-phenyl-4-oxo-4,5,6,7-tetrahydroindole (IIIb, IVab-VIIab,VIIIb, IXb) and 2-phenyl-4-oxo-4,5,6,7-tetrahydrobenzofuran derivatives (IIab).The fragmentations of these compo

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