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193007-24-8

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193007-24-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193007-24-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,0,0 and 7 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 193007-24:
(8*1)+(7*9)+(6*3)+(5*0)+(4*0)+(3*7)+(2*2)+(1*4)=118
118 % 10 = 8
So 193007-24-8 is a valid CAS Registry Number.

193007-24-8Relevant articles and documents

Chemical synthesis of 15N-labeled analogues of zervamicin IIB

Rimawi,Ogrel,Raap,Shvets

, p. 725 - 733 (2007/10/03)

Analogues of 16-membered peptide antibiotic zervamicin IIB with the Gln3 and Gln11 residues 15N-labeled at the Cα-atoms were synthesized by coupling the antibiotic segments (1-4), (5-9), and (10-16). In turn, these were prepared by a stepwise chain elongation in solution starting from their C-termini using benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (BOP) as an activating agent. The sterically hindered 2-aminoisobutyric acid was introduced by the BOP-dimethylaminopyridine system with the preactivation of the carboxyl component. The segment condensation was performed with the use of the 6-trifluoromethylbenzotriazol-1-yloxy-tris(pyrrolidino)phosphonium hexafluorophosphate activating reagent. The homogeneity of the resulting zervamicin analogues was confirmed by HPLC, and their structures were proved by NMR spectroscopy and FAB mass spectrometry.

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