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443666-67-9

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443666-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 443666-67-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,3,6,6 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 443666-67:
(8*4)+(7*4)+(6*3)+(5*6)+(4*6)+(3*6)+(2*6)+(1*7)=169
169 % 10 = 9
So 443666-67-9 is a valid CAS Registry Number.

443666-67-9Relevant articles and documents

Pyrrolopyrimidines. 5*. Reaction of 6-amino-1,3-dimethyl-pyrrolo[3,4- d]pyrimidine-2,4(1H,3H)-diones with 1,3-diketones

Tsupak,Shevchenko,Pozharskii,Tkachenko

, p. 953 - 959 (2003)

The reaction of 6-amino-1,3-dimethylpyrrolo[3,4-d]pyrimidine-2,4-dione with 1,3-diketones leads to formation of predominantly pyrimido[4′, 5′:3,4]pyrrolo[1,2-b]pyridazine-2,4(1H,3H)-diones and, to a lesser extent, pyrimido[5′,4′:3,4]pyrrolo[1,2-b]pyridazi

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