873443-65-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 873443-65-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,3,4,4 and 3 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 873443-65:
(8*8)+(7*7)+(6*3)+(5*4)+(4*4)+(3*3)+(2*6)+(1*5)=193
193 % 10 = 3
So 873443-65-3 is a valid CAS Registry Number.
873443-65-3Relevant articles and documents
Process for preparation of pyridine derivatives of NK-1 receptor antagonist
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Page/Page column 11-12, (2010/02/15)
The present invention provides a process for preparing a pyridine compound of the formula: wherein R1, R2, R3 and a are those defined herein.