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20780-35-2

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20780-35-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20780-35-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,8 and 0 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20780-35:
(7*2)+(6*0)+(5*7)+(4*8)+(3*0)+(2*3)+(1*5)=92
92 % 10 = 2
So 20780-35-2 is a valid CAS Registry Number.

20780-35-2Relevant articles and documents

Sterols in Marine Invertebrates. 32. Isolation of 3β-(Hydroxymethyl)-A-nor-5α-cholest-15-ene, the First Naturally Occurring Sterol with a 15-16 Double Bond

Eggersdorfer, Manfred L.,Kokke, W. C. M. C.,Crandell, Christopher W.,Hochlowski, Jill E.,Djerassi, Carl

, p. 5304 - 5309 (2007/10/02)

A new A-nor sterol, 3β-(hydroxymethyl)-A-nor-5α-cholest-15-ene, with an unusual unsaturation in the Δ15 position has been found in the Pacific sponge Homaxinella trachys together with ten other A-nor sterols.The structure was elucidated by 360-MHz 1H NMR, 13C NMR, and mass spectral analysis as well as by chemical interconversion and comparision with synthetic 5α-cholest-15-en-3β-ol. 13C NMR spectra of the title compound and of various 3β-(hydroxymethyl)-A-nor-5α-cholestanes were assigned as an aid in future structure elucidation of this class of sterols.

Hydroxy-steroids. IV. The preparation and spectra of steroid olefins.

Cragg,Davey,Hall,Meakins,Richards,Whateley

, p. 1266 - 1276 (2007/10/10)

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