52161-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 52161-21-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,6 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 52161-21:
(7*5)+(6*2)+(5*1)+(4*6)+(3*1)+(2*2)+(1*1)=84
84 % 10 = 4
So 52161-21-4 is a valid CAS Registry Number.
52161-21-4Relevant articles and documents
Preparation method of prucalopride succinate
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Paragraph 0044; 0047; 0054; 0057; 0064; 0067, (2019/01/08)
The invention provides a preparation method of prucalopride succinate. The method comprises the steps that 4-nitrobenzaldehyde is taken as an initial raw material, and protected by formyl group, nitroreduction, amino protection, aromatic hydrocarbon chlor