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139259-03-3

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139259-03-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139259-03-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,5 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139259-03:
(8*1)+(7*3)+(6*9)+(5*2)+(4*5)+(3*9)+(2*0)+(1*3)=143
143 % 10 = 3
So 139259-03-3 is a valid CAS Registry Number.

139259-03-3Relevant articles and documents

Asymmetric Synthesis of Indoloquinolizidin-2-ones Congeners to Yohimbine-Type Alkaloids

Waldmann, Herbert,Braun, Matthias,Weymann, Markus,Gewehr, Markus

, p. 397 - 416 (2007/10/02)

Schiff bases derived from tryptophan methyl ester and tryptamine react with Danishefkys diene in the presence of ZnCl2 to give enaminones which are subsequently transformed into indoloquinolizidin-2-ones by acid-catalyzed cyclization.These tetracyc

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