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263247-61-6

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263247-61-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 263247-61-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,3,2,4 and 7 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 263247-61:
(8*2)+(7*6)+(6*3)+(5*2)+(4*4)+(3*7)+(2*6)+(1*1)=136
136 % 10 = 6
So 263247-61-6 is a valid CAS Registry Number.

263247-61-6Downstream Products

263247-61-6Relevant articles and documents

Synthesis of a radoilabeled type A cholecystokinin receptor antagonist, (R)-N-pentyl-N-(4,5-di[3H]pentyl)N(α)-(3-quinolinoyl)glutamic acid amide

Malone, Justin A.,Reidelberger, Roger D.,Hulce, Martin

, p. 77 - 90 (2007/10/03)

A method for the preparation of a radiolabeled CCK(A)-specific antagonist, (R)-N-pentyl-N-(4,5-di[3H]pentyl)N(α)-(3-quinolinoyl)glutamic acid amide, [3H]-A-65186, is described. (R)-γ-Benzyl-N-BOC-glutamic acid was coupled with N-(4-pentenyl)-N-pentylamine using BOPCl and TEA in dichloromethane to provide the corresponding amide. Deprotection of the α-amino moiety followed by coupling with 3-quinolinecarboxylic acid in the presence of EDCI, TEA, and HOBt in dichloromethane resulted in (R)-N-(4-pentenyl)-N-pentyl γ-benzyl-N(α)-(3-quinolinoyl)glutamic acid amide. Tritiation with concomitant hydrogenolysis of the benzyl ester proceeds smoothly to provide [3H]-A-65186.

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