Cas 80334-72-1,4-Cinnolinecarboxaldehyde, 3-methyl-

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Check Digit Verification of cas no

The CAS Registry Mumber 80334-72-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,3,3 and 4 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 80334-72:
(7*8)+(6*0)+(5*3)+(4*3)+(3*4)+(2*7)+(1*2)=111
111 % 10 = 1
So 80334-72-1 is a valid CAS Registry Number.

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80334-72-1Relevant articles and documents

Cinnolines. Part 1. Widman-Stoermer Reactions of Functionalised 2-Phenylbut-2-enes to give Cinnolinecarbaldehydes

Barton, John W.,Pearson, Neil D.

, p. 1541 - 1546 (2007/10/02)

Diazotisation of a mixture of the E- and Z-isomers of 2-(2-aminophenyl)but-2-ene-1,4-diol gives 4-(hydroxymethyl)cinnoline-3-carbaldehyde, by spontaneous oxidation of the presumed intermediate, 3,4-bis(hydroxymethyl)cinnoline.Further oxidation of the reac

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CAS

80334-72-1