157865-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157865-05-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,8,6 and 5 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 157865-05:
(8*1)+(7*5)+(6*7)+(5*8)+(4*6)+(3*5)+(2*0)+(1*5)=169
169 % 10 = 9
So 157865-05-9 is a valid CAS Registry Number.
157865-05-9Relevant academic research and scientific papers
2-Acyl-4,5-dihydro-4-oxo-pyrano[3,2-b]indole
Gorlitzer,Michels
, p. 14 - 17 (2007/10/02)
The oxalic acid ester method applied to the 1,3-dicarbonyl compound 1 leads over the 1,3,5,6-tetracarbonyl compound 2 and the pyrone-2-carboxylic acid esters 3 to the carboxylic acids 4. The aldehydes 6 and the nitriles 10 as key substances for further po
