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109740-20-7

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109740-20-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109740-20-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109740-20:
(8*1)+(7*0)+(6*9)+(5*7)+(4*4)+(3*0)+(2*2)+(1*0)=117
117 % 10 = 7
So 109740-20-7 is a valid CAS Registry Number.

109740-20-7Relevant academic research and scientific papers

Three Routes to the Critical C16'-C14' Parf Relative Stereochemistry of Vinblastine. Syntheses of 20'-Desethyl-20'-deoxyvinblastine and 20'-Desethyl-20'-deoxyvincovaline

Kuehne, M. E.,Zebovitz, T. C.,Bornmann, W. G.,Marko, I.

, p. 4340 - 4349 (2007/10/02)

Coupling reactions of vindoline (2) with the racemic chloro imine derivative 8 of 14-epi-D-secodesethylvincadifformine (7) resulted in a selective high yield formation of the C16'-C14' parf (vinblastine type) relative configuration of the coupling product

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