Cas 91157-40-3,1-carbobenzoxy-3-(2-carbomethoxyethyl)-4-piperidone

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Check Digit Verification of cas no

The CAS Registry Mumber 91157-40-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,1,5 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91157-40:
(7*9)+(6*1)+(5*1)+(4*5)+(3*7)+(2*4)+(1*0)=123
123 % 10 = 3
So 91157-40-3 is a valid CAS Registry Number.

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91157-40-3Relevant academic research and scientific papers

Conformationally Restrained Fentanyl Analogues. 2. Synthesis and Analgetic Evaluation of Perhydro-1,6-naphthyridin-2-ones

Borne, Ronald F.,Fifer, E. Kim,Waters, I.W.

, p. 1271 - 1275 (2007/10/02)

Conformational flexibility of the N-acyl portion of fentanyl-type analgetics was restricted through the synthesis of novel perhydro-1,6-naphthyridin-2-one derivatives.Neither the cis-fused derivative (5a), the trans-fused derivative (5b), nor the enamide

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