142891-56-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142891-56-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,8,9 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 142891-56:
(8*1)+(7*4)+(6*2)+(5*8)+(4*9)+(3*1)+(2*5)+(1*6)=143
143 % 10 = 3
So 142891-56-3 is a valid CAS Registry Number.
142891-56-3Relevant academic research and scientific papers
Pyridine compounds from etacrynic acid, II
Gorlitzer,Duwel
, p. 357 - 359 (2007/10/02)
Starting with the methyl nicotinate 2 the nicotinamide 4, the 5-hydroxymethyl compound 5 and - in five steps - the 5,6-bis(hydroxymethyl)pyridine 10 are prepared. The N-oxide 3 reacts with nitric acid to yield the nitro aromate 11.
