119020-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 119020-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,0,2 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 119020-99:
(8*1)+(7*1)+(6*9)+(5*0)+(4*2)+(3*0)+(2*9)+(1*9)=104
104 % 10 = 4
So 119020-99-4 is a valid CAS Registry Number.
119020-99-4Relevant academic research and scientific papers
SYNTHESIS OF 7H-8,9-DIHYDRO-4,8-DIMETHYLPYRANOINDOL-2-ONES
Prasad, D. Vijaya,Darbarwar, Malleshwar
, p. 881 - 888 (2007/10/02)
The synthesis of pyrrolocoumarins viz., 7H-8,9-dihydro-4,8-dimethylpyranoindol-2-ones, a new tricyclic system (5), have been achieved from 7-amino-4-methylcoumarin (1) by tosylation, allylation and neat pyrolysis.A plausible mechanism involving ami
