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215923-83-4

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215923-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 215923-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,5,9,2 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 215923-83:
(8*2)+(7*1)+(6*5)+(5*9)+(4*2)+(3*3)+(2*8)+(1*3)=134
134 % 10 = 4
So 215923-83-4 is a valid CAS Registry Number.

215923-83-4Relevant academic research and scientific papers

Synthesis of a C11 spiropiperidino derivative of 8-chloro-6,11- dihydro 5H-benzo[5,6]cyclohepta[1,2-b]pyridine

Afonso, Adriano,Kelly,Puar, Mohindar S.,McCombie, Stuart,McPhail, Andrew T.

, p. 7661 - 7664 (2007/10/03)

A method using N-tosyl aziridine for the synthesis of a spiropiperidine 2 (R=H) is described. Cleavage of the N-tosyl group of the intermediate 8 to form the spiropiperidinone 9 was found to proceed in high yield with conc. sulfuric acid. Acylated derivat

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