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840-11-9

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840-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 840-11-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,4 and 0 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 840-11:
(5*8)+(4*4)+(3*0)+(2*1)+(1*1)=59
59 % 10 = 9
So 840-11-9 is a valid CAS Registry Number.

840-11-9Relevant articles and documents

Iterative Assembly of Macrocyclic Lactones using Successive Ring Expansion Reactions

Stephens, Thomas C.,Lawer, Aggie,French, Thomas,Unsworth, William P.

supporting information, p. 13947 - 13953 (2018/09/14)

Macrocyclic lactones can be prepared from lactams and hydroxyacid derivatives via an efficient 3- or 4-atom iterative ring expansion protocol. The products can also be expanded using amino acid-based linear fragments, meaning that macrocycles with precise

Activation of the amide group by acylation hydroxy- and aminoacyl incorporation in peptide systems.

Shemyakin,Antonov,Shkrob,Shchelokov,Agadzhanyan

, p. 3537 - 3572 (2007/10/04)

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