Cas 169692-25-5,8-(2-chlorobenzoylamino)theophylline

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Check Digit Verification of cas no

The CAS Registry Mumber 169692-25-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,6,9 and 2 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 169692-25:
(8*1)+(7*6)+(6*9)+(5*6)+(4*9)+(3*2)+(2*2)+(1*5)=185
185 % 10 = 5
So 169692-25-5 is a valid CAS Registry Number.

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169692-25-5Relevant articles and documents

Synthesis of fused purinoquinazolines. Three new heterocyclic ring systems

Settimo, Antonio Da,Primofiore, Giampaolo,Cristina, Bertacchi Maria,Settimo, Federico Da,Marini, Anna Maria

, p. 941 - 946 (2007/10/03)

The Ullmann reaction of 8-aminotheophylline or 8-aminocaffeine with 2-chlorobenzoic acid and 8-bromotheophylline with ethyl-2-aminobezoate afforded derivatives of three new heterocyclic system: purinoquinazoline-5,9,11(6H,8H,10H)-trione, purino8,9

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169692-25-5