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139761-20-9

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139761-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139761-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,6 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 139761-20:
(8*1)+(7*3)+(6*9)+(5*7)+(4*6)+(3*1)+(2*2)+(1*0)=149
149 % 10 = 9
So 139761-20-9 is a valid CAS Registry Number.

139761-20-9Relevant articles and documents

Syntheses, resolution, and structure-activity relationships of potent acetylcholinesterase inhibitors: 8-Carbaphysostigmine analogues

Chen,Nielsen,Hedberg,Dunaiskis,Jones,Russo,Johnson,Ives,Liston

, p. 1429 - 1434 (1992)

The synthesis of a series of 1,2,3,3a,8,8a-hexahydroindeno[2,1-b]pyrrole 5-alkylcarbamates and their resolution are reported. These compounds are structurally related to physostigmine with substitution of a methylene group in place of the NMe group at pos

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