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917501-50-9

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917501-50-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 917501-50-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,7,5,0 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 917501-50:
(8*9)+(7*1)+(6*7)+(5*5)+(4*0)+(3*1)+(2*5)+(1*0)=159
159 % 10 = 9
So 917501-50-9 is a valid CAS Registry Number.

917501-50-9Relevant articles and documents

Biomimetic formation of gramicidin S by dimerization-cyclization of pentapeptide precursor on solid support

Tamaki, Makoto,Honda, Kenji,Kikuchi, Sho,Ishii, Rie

, p. 8475 - 8478 (2007/10/03)

The biomimetic formation of gramicidin S, cyclo(-d-Phe-Pro-Val-Orn-Leu-)2, by the dimerization and cyclization of pentapeptide precursor without the protection of δ-amino group of the Orn residue was examined on a solid support. The cyclization of H-d-Phe-Pro-Val-Orn-Leu-oxime on a resin with an oxime group of 0.62 mmol/g in 1,4-dioxane directly gave gramicidin S in a 50% yield. The dimerization-cyclization mode on the solid support was similar to that of the biosynthesis of gramicidin S on an enzyme.

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