90402-67-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90402-67-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,4,0 and 2 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 90402-67:
(7*9)+(6*0)+(5*4)+(4*0)+(3*2)+(2*6)+(1*7)=108
108 % 10 = 8
So 90402-67-8 is a valid CAS Registry Number.
90402-67-8Relevant academic research and scientific papers
An Improved Synthesis of Pyridopyrimidines
Itoh, Tsuneo,Fujii, Ikuko,Tomii, Yasuo,Ishikawa, Ichiro,Ogura, Haruo,et al.
, p. 1453 - 1455 (2007/10/02)
An improved and efficient synthesis of 1,3-dialkylpyridopyrimidine-2,4-(1H,3H)-diones from 6-methylaminouracils and methyl propiolate or diethyl ethoxymethylenemalonate is described.
