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82543-09-7

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82543-09-7 Usage

Chemical Properties

Off-White Crystalline Solid

Uses

Drospirenone intermediate.

Check Digit Verification of cas no

The CAS Registry Mumber 82543-09-7 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, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 82543-09:
(7*8)+(6*2)+(5*5)+(4*4)+(3*3)+(2*0)+(1*9)=127
127 % 10 = 7
So 82543-09-7 is a valid CAS Registry Number.

82543-09-7Relevant articles and documents

Process for preparing 3β,7β-dihydroxy-Δ5 -steroids

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, (2008/06/13)

A process for preparing a 3β,7β-dihydroxy-Δ5 steroid of the formula STR1 wherein Q is STR2 and R1 is hydrogen, trimethylacetyl, tert-butyldimethylsilyl, dimethyl-2-(3-methylbutyl)silyl or tribenzylsilyl, comprises fermenting a 3β-hydroxy-Δ5 -steroid of the formula STR3 wherein Q is as defined above, and R2 is hydrogen or alkanoyl of 2-6 carbon atoms, with a culture of Botryodiplodia malorum to obtain the corresponding 3β,7β-dihydroxy-Δ5 -steroid; and, optionally, reacting the resultant product with trimethylacetic anhydride, tert-butyldimethylsilyl chloride, dimethyl-2-(3-methylbutyl)silyl chloride, or tribenzylsilyl chloride.

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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