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441011-26-3

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441011-26-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 441011-26-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,1,0,1 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 441011-26:
(8*4)+(7*4)+(6*1)+(5*0)+(4*1)+(3*1)+(2*2)+(1*6)=83
83 % 10 = 3
So 441011-26-3 is a valid CAS Registry Number.

441011-26-3Relevant articles and documents

An intramolecular furan-diene diels-alder approach to 11-oxo 10α-steroids

Claeys, Sandra,Van Haver, Dirk,De Clercq, Pierre J.,Milanesio, Marco,Viterbo, Davide

, p. 1051 - 1062 (2007/10/03)

The intramolecular cycloaddition of 14, with dimethylaluminium chloride as a catalyst and under kinetic control, yielded the exo adduct 19a. Opening of the oxygen bridge in the reduced adduct 20 gave intermediate 21. Oxidation of the latter made it possible to introduce the methyl group at C-10, which exclusively afforded 23, with the unnatural configuration. Further conversion resulted in the formation of D-homo-10-epi-adrenosterone (25). Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.

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