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116950-31-3

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116950-31-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 116950-31-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,9,5 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 116950-31:
(8*1)+(7*1)+(6*6)+(5*9)+(4*5)+(3*0)+(2*3)+(1*1)=123
123 % 10 = 3
So 116950-31-3 is a valid CAS Registry Number.

116950-31-3Relevant articles and documents

Synthesis of Sequential Polydepsipeptides Involving Depsipeptide Formation by the 2-Nitrophenylsulphenyl N-Carboxy α-Amino Acid Anhydride (Nps-NCA) Method

Katakai, Ryoichi

, p. 2249 - 2252 (2007/10/02)

Sequential polydepsipeptides containing a tripeptide sequence Ala-Ala-Glu(OEt) and various α-hydroxy acids have been successfully prepared by polycondensation of tetradepsipeptide pentachlorophenyl esters.The latter were synthesized by preparation of didepsipeptide free acids by the Nps-NCA method followed by active esterification and peptide chain elongation by the so-called 'back-up' procedure.

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