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80140-49-4

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80140-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80140-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,1,4 and 0 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 80140-49:
(7*8)+(6*0)+(5*1)+(4*4)+(3*0)+(2*4)+(1*9)=94
94 % 10 = 4
So 80140-49-4 is a valid CAS Registry Number.

80140-49-4Downstream Products

80140-49-4Relevant articles and documents

Synthesis of 6(H)-Aryl-benzopyranonaphthyridines

Mogilaiah, K.,Raju, Raghava K.,Sreenivasulu, B.

, p. 821 - 822 (2007/10/02)

2-Aminonicotinaldehyde (I) reacts with substituted 2'-hydroxychalkones (II) or flavanones (III) to give the corresponding 6(H)-arylbenzopyranonaphthyridines (IV) in the presence of acetic acid containing catalytic amount of conc. sulphuric acid.Structures of all the products have been established by IR, PMR and mass spectral data.

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