1217903-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217903-57-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,9,0 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1217903-57:
(9*1)+(8*2)+(7*1)+(6*7)+(5*9)+(4*0)+(3*3)+(2*5)+(1*7)=145
145 % 10 = 5
So 1217903-57-5 is a valid CAS Registry Number.
1217903-57-5Relevant articles and documents
A novel synthesis of 3-(substituted)pyrimido[4,5-c]pyridazine-5,7(1H,6H)-diones
Turbiak, Anjanette J.,Kampf, Jeff W.,Hollis Showalter
, p. 1326 - 1328 (2010)
An improved synthesis of 3-(substituted)pyrimido[4,5-c]pyridazine-5,7(1H,6H)-diones, a known subclass of 4-deazatoxoflavins, is reported. The approach involves treatment of 3-methyl-6-(1-methylhydrazinyl)uracil with representative phenyl and alkyl glyoxal
