420811-18-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 420811-18-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,0,8,1 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 420811-18:
(8*4)+(7*2)+(6*0)+(5*8)+(4*1)+(3*1)+(2*1)+(1*8)=103
103 % 10 = 3
So 420811-18-3 is a valid CAS Registry Number.
420811-18-3Relevant academic research and scientific papers
Synthesis of the azathiopurine analogs
Kowalska, Alicja,Pluta, Krystian
, p. 555 - 569 (2008/09/20)
The effective synthesis of the azathioprine analogs - 2-subsituted derivatives of 7-methyl-6-(1-methyl-4-nitroimidazol-5-ylthio)purines 5 has been achieved by the reaction of 2-subsituted 6-purinethiones 4 with 5-chloro-l-methyl-4-nitroimidazole in ethano
