631891-49-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 631891-49-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,1,8,9 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 631891-49:
(8*6)+(7*3)+(6*1)+(5*8)+(4*9)+(3*1)+(2*4)+(1*9)=171
171 % 10 = 1
So 631891-49-1 is a valid CAS Registry Number.
631891-49-1Relevant academic research and scientific papers
Synthesis of 2-alkyl-1-aryl-1,2-dihydrochromeno[2,3-c]pyrrole-3,9-dione derivatives
Vydzhak,Panchishin, S. Ya.
experimental part, p. 2391 - 2397 (2009/05/30)
A preparative procedure for the synthesis of 2-alkyl-1-aryl-1,2- dihydrochromeno[2,3-c]pyrrole-3,9-diones from methyl 4-(o-hydroxyphenyl)-2,4- dioxobutanoate, aromatic aldehyde, and aliphatic amine is described.
