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20643-72-5

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20643-72-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20643-72-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,4 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20643-72:
(7*2)+(6*0)+(5*6)+(4*4)+(3*3)+(2*7)+(1*2)=85
85 % 10 = 5
So 20643-72-5 is a valid CAS Registry Number.

20643-72-5Relevant academic research and scientific papers

Mechanistic Aspects of the Formation of Anhydrovinblasine by Potier-Polonovski Oxidative Coupling of Catharanthine and Vindoline. Spectroscopic Observation and Chemical Reactions of Intermediates

Sundberg, Richard J.,Gadamasetti, Kumar G.,Hunt, Phyllis J.

, p. 277 - 296 (2007/10/02)

The fragmentation-coupling of catharanthine and vindoline by trifluoroacetic anhydride has been carried out under conditions which allow observation of intermediates and comparison of the reactivity by low temperature NMR.These studies have been confirmed

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