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503817-79-6

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503817-79-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 503817-79-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,8,1 and 7 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 503817-79:
(8*5)+(7*0)+(6*3)+(5*8)+(4*1)+(3*7)+(2*7)+(1*9)=146
146 % 10 = 6
So 503817-79-6 is a valid CAS Registry Number.

503817-79-6Relevant articles and documents

Total synthesis and absolute configuration of radiosumin, a strong trypsin inhibitor from the blue-green alga Plectonema radiosum

Noguchi, Hirohide,Aoyama, Toyohiko,Shioiri, Takayuki

, p. 471 - 504 (2007/10/03)

Radiosumin (1), a strong trypsin inhibitory dipeptide isolated from the freshwater blue-green alga Plectonema radiosum (NIES-515), was synthesized for the first time by use of the hetero Diels-Alder reaction, the Horner-Wadsworth-Emmons reaction, the Corey-Winter reaction, regioselective hydrogenation, and reduction with zinc and formic acid as key steps, which unambiguously determined the absolute configuration of the structurally unique and biologically intriguing aquatic natural product (1).

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