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220717-72-6

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220717-72-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220717-72-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,7,1 and 7 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 220717-72:
(8*2)+(7*2)+(6*0)+(5*7)+(4*1)+(3*7)+(2*7)+(1*2)=106
106 % 10 = 6
So 220717-72-6 is a valid CAS Registry Number.

220717-72-6Relevant articles and documents

Total synthesis of bistratamide D

Downing, Susan V.,Aguilar, Enrique,Meyers

, p. 826 - 831 (2007/10/03)

The total synthesis of the macrocyclic hexapeptide bistratamide D is reported. The synthetic strategy involved assembly of enantiomerically pure oxazole, thiazole, and oxazoline segments derived from amino acids. Macrocyclization of the hexapeptidic aminooxazoline-oxazole-thiazole carboxylic acid fragment was accomplished by activation with O-(7- azabenzotriazol-1-yl)-N,N,N',N'-tetramethyl-uronium hexafluorophosphate (HATU).

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