123845-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123845-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,8,4 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 123845-20:
(8*1)+(7*2)+(6*3)+(5*8)+(4*4)+(3*5)+(2*2)+(1*0)=115
115 % 10 = 5
So 123845-20-5 is a valid CAS Registry Number.
123845-20-5Relevant articles and documents
Macrocyclic polyether tetralactams I: Synthesis and cyclization studies
Duriez,Pigot,Picard,Cazaux,Tisnes
, p. 4347 - 4358 (2007/10/02)
A three-step method for the synthesis of new 18,21 or 24-membered macrocyclic tetralactams with two dimethyleneoxy moieties is described. The method consists in the ring closure of a bis-secondary amine with a diamide diacid derivative activated by the th
