632304-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 632304-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,2,3,0 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 632304-81:
(8*6)+(7*3)+(6*2)+(5*3)+(4*0)+(3*4)+(2*8)+(1*1)=125
125 % 10 = 5
So 632304-81-5 is a valid CAS Registry Number.
632304-81-5Relevant articles and documents
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.