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261901-19-3

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261901-19-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 261901-19-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,1,9,0 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 261901-19:
(8*2)+(7*6)+(6*1)+(5*9)+(4*0)+(3*1)+(2*1)+(1*9)=123
123 % 10 = 3
So 261901-19-3 is a valid CAS Registry Number.

261901-19-3Downstream Products

261901-19-3Relevant articles and documents

Synthesis of pyridopyranoquinolines by the Skraup reaction of amino-5H- benzopyrano[2,3-b]pyridin-5-ones

Fujiwara, Hidetoshi,Kitagawa, Kouki

, p. 409 - 417 (2007/10/03)

7-, 8- and 9-Amino-5H-[1]benzopyrano[2,3-b]-pyridin-5-ones were synthesized. Skraup reaction of 6-Amino-, 7-amino-, 8-amino- and 9-Amino-5H- [1]benzopyrano[2,3-b]pyridin-5-ones in the presence of glycerol, fuming sulfuric acid, nitrobenzene, iron(II) sulf

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