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20839-93-4

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20839-93-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20839-93-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,3 and 9 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20839-93:
(7*2)+(6*0)+(5*8)+(4*3)+(3*9)+(2*9)+(1*3)=114
114 % 10 = 4
So 20839-93-4 is a valid CAS Registry Number.

20839-93-4Downstream Products

20839-93-4Relevant articles and documents

Synthesis and spectroscopic characterization of [1′-14C]ubiquinone-2, [1′-14C]-5-demethoxy-5-hydroxyubiquinone-2, and [1′-14C]-5-demethoxyubiquinone-2

Van Der Klei, Anita,De Jong, Robertus L. P.,Lugtenburg, Johan,Tielens, Aloysius G. M.

, p. 3015 - 3023 (2007/10/03)

[1′-14C]Ubiquinone-2, [1′-14C]-5-demethoxy-5-hydroxyubiquinone-2, and [1′-14C]-5-demethoxyubiquinone-2 have been synthesised from [1-14C]acetic acid. A common feature of these benzoquinones is the isoprenoid chain, and the 14C-label has therefore been incorporated in this isoprenoid. The coupling of the different quinone head groups and the isoprenoid chain is the last step in the total synthesis, to prevent unnecessary loss of the labelled material during synthesis. The products have been characterised by mass spectrometry, 1H NMR and 13C NMR.

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