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139643-69-9

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139643-69-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139643-69-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,4 and 3 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139643-69:
(8*1)+(7*3)+(6*9)+(5*6)+(4*4)+(3*3)+(2*6)+(1*9)=159
159 % 10 = 9
So 139643-69-9 is a valid CAS Registry Number.

139643-69-9Relevant academic research and scientific papers

(1R)- And (1S)-5-demethyl-8,16-methanobacteriorhodopsin and its properties. The synthesis and spectroscopy of 5-demethyl-8,16-methanoretinal in optically active and isotopic forms

Spijker-Assink, M. B.,Robijn, G. W.,Ippel, J. H.,Lugtenburg, J.,Groen, B. H.,Dam, K. van

, p. 29 - 40 (2007/10/02)

(All-E)-5-demethyl-8,16-methanoretinal was prepared in both optical antipodes (1R and 1S), as well as in their 9-Z and 13-Z forms.The interaction of the 1R and 1S forms with bacterioopsin shows that there is a clear chiral recognition on the formation of

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