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89016-48-8

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89016-48-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89016-48-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,0,1 and 6 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 89016-48:
(7*8)+(6*9)+(5*0)+(4*1)+(3*6)+(2*4)+(1*8)=148
148 % 10 = 8
So 89016-48-8 is a valid CAS Registry Number.

89016-48-8Relevant articles and documents

Synthesis of (+/-)-10,22-Dioxokopsane and (+/-)-Kopsanone, Heptacyclic Indole Alkaloids. Synthetic and Mechanistic Studies

Magnus, Philip,Gallagher, Timothy,Brown, Peter,Huffman, John C.

, p. 2105 - 2114 (2007/10/02)

The total synthesis of the heptacyclic indole alkaloids (+/-)-10,22-dioxokopsane (2) and (+/-)-kopsanone (3, X=O) is described.The imine 20 was condensed with β,β,β-trichloroethyl chloroformate to give the tetracyclic carbamate 21.Removal of the carbamate

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