204995-04-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204995-04-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,9,9 and 5 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 204995-04:
(8*2)+(7*0)+(6*4)+(5*9)+(4*9)+(3*5)+(2*0)+(1*4)=140
140 % 10 = 0
So 204995-04-0 is a valid CAS Registry Number.
204995-04-0Relevant articles and documents
Hemirubin: An Intramolecularly Hydrogen-Bonded Analogue for One-Half Bilirubin
Chen, Qingqi,Lightner, David A.
, p. 2665 - 2675 (1998)
A model for one-half bilirubin, the neurotoxic yellow-orange pigment of jaundice, 9-[2-(2-carboxyethyl)benzyl]-2,3,7,8-tetramethyl-l,10-dihydrodipyrrin (1, hemirubin) was synthesized following SnCl4-catalyzed Friedel-Crafts acylation at C(9) of