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138541-15-8

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138541-15-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138541-15-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,4 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 138541-15:
(8*1)+(7*3)+(6*8)+(5*5)+(4*4)+(3*1)+(2*1)+(1*5)=128
128 % 10 = 8
So 138541-15-8 is a valid CAS Registry Number.

138541-15-8Relevant articles and documents

Total Synthesis of Thymosin β4, 2. Conventional Synthesis of the Fragment of Thymosin β4

Kapurniotu, Afroditi,Voelter, Wolfgang

, p. 361 - 370 (2007/10/02)

As part of the total synthesis of thymosin β4 three synthetic pathways for the synthesis of the thymosin β4 fragment are described.The side-chain functions are protected by tert-butyl and the α-amino residues by Z groups.As temporary protection of the carboxyl function the phenyl ester is successfully used.Key Words: Thymosin β4, fragment /Thymus peptides/Amino acids/Protecting groups, phenyl esters of peptides as/Peptides

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