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71298-20-9

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71298-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71298-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,2,9 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 71298-20:
(7*7)+(6*1)+(5*2)+(4*9)+(3*8)+(2*2)+(1*0)=129
129 % 10 = 9
So 71298-20-9 is a valid CAS Registry Number.

71298-20-9Downstream Products

71298-20-9Relevant articles and documents

Structures of Four New Oxygenated Lupanes from Pleurostylia opposita (Celastraceae)

Dantanarayana, Anura P.,Kumar, N. Savitri,Sultanbawa, M. Uvais S.,Balasubramaniam, Sinnathamby

, p. 2717 - 2723 (2007/10/02)

Four new oxygenated lupanes isolated from the steam bark of Pleurostylia opposita (Wall) Alston (Celastraceae) have been shown to be lupa-5,20(29)-dien-3-one (2), 6β,20-dihydroxylupan-3-one (5), 3β,6β-dihydroxylup-20(29)-ene (6), and 6β,28-dihydroxylup-20(29)-en-3-one (8).The structures of these compounds were established on the basis of spectroscopic (1H n.m.r. and mass spectra) and chemical evidence.Deshielding of three methyl signals in the 1H n.m.r. spectra of 6β-hydroxylupane derivatives has been attributed to 1,3-diaxial interaction between the relevant methyl group and the 6β-hydroxy-group.

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