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271600-49-8

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271600-49-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 271600-49-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,1,6,0 and 0 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 271600-49:
(8*2)+(7*7)+(6*1)+(5*6)+(4*0)+(3*0)+(2*4)+(1*9)=118
118 % 10 = 8
So 271600-49-8 is a valid CAS Registry Number.

271600-49-8Relevant articles and documents

Recognition of quaternary ammonium salts with tetrapeptides containing α-aminoisobutyric acid as a conformational constraint

Yanagihara, Ryoji,Katoh, Masaki,Hanyuu, Masayuki,Miyazawa, Toshifumi,Yamada, Takashi

, p. 551 - 556 (2007/10/03)

Tetrapeptides Trp-Aib-Gly-Leu-NH-Ar (Aib:α-aminoisobutyric acid, 2-amino-2-methylpropanoic acid, Ar = phenyl or 3,5-dimethylphenyl) were synthesized. The peptides bound quaternary ammonium salts as guests in CDCl3. For every guest, the binding constant K of the peptide host which has a 3,5-dimethylphenyl group was larger than that of the host which has a phenyl group. ROESY analysis of the complex revealed that the N+-CH3 groups of the guests were close to the aromatic moieties of the host in the complex. The charge in cation guests, the φ-basicity of the host, and the turn conformation of the peptides were important factors for the complexation.

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