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82543-18-8

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  • 17α-(3-hydroxypropyl)-6β,7β;15β,16β-dimethylene-5β-androstane-3β,5,17β-triol

    Cas No: 82543-18-8

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82543-18-8 Usage

Chemical Properties

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Check Digit Verification of cas no

The CAS Registry Mumber 82543-18-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,5,4 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 82543-18:
(7*8)+(6*2)+(5*5)+(4*4)+(3*3)+(2*1)+(1*8)=128
128 % 10 = 8
So 82543-18-8 is a valid CAS Registry Number.

82543-18-8Relevant articles and documents

A drospirenone and intermediate preparation method (by machine translation)

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Paragraph 0088-0090, (2019/11/20)

The invention discloses a drospirenone and intermediate preparation method. Preparation method of this invention comprises the following steps: in the solvent, the compound 3 with hydrogen peroxide oxidation reaction shown below, to obtain compound 4 can be. Preparation method of this invention does not use a heavy metal reagent, reduces the toxicity of the preparation process, the use of the reagent are all conventional reagent, low cost, and is favorable for industrial large-scale production. (by machine translation)

Process for the preparation of drospirenone

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Page/Page column 7, (2008/06/13)

A process is described for preparing drospirenone, a synthetic steroid with progestogenic, antimineralocorticoid and antiandrogenic activity, useful for the preparation of pharmaceutical compositions with contraceptive action, starting from 5,6beta-epoxy-7beta-hydroxy-15beta,16beta-methylene-3beta-pivaloyloxy-5beta-androstan-17-one.

Synthese von Spirorenon, einem neuen stark wirksamen Aldosteron-Antagonisten

Bittler, Dieter,Hofmeister, Helmut,Laurent, Henry,Nickisch, Klaus,Petzoldt, Karl,et al.

, p. 718 - 719 (2007/10/02)

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