118458-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 118458-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,4,5 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 118458-52:
(8*1)+(7*1)+(6*8)+(5*4)+(4*5)+(3*8)+(2*5)+(1*2)=139
139 % 10 = 9
So 118458-52-9 is a valid CAS Registry Number.
118458-52-9Relevant academic research and scientific papers
Synthesis of Indolopyrrolocarbazoles by Double Fischer Indolizations
Bergman, Jan,Pelcman, Benjamin
, p. 824 - 828 (2007/10/02)
A synthesis of indolopyrrolocarbazoles (16) based on a double Fisher indolization of the bis(phenylhydrazones) (10), employing polyphosphoric acid trimethylsilyl ester (PPSE) as the cyclization agent, is described.The bis(phenylhydrazones) (
