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3091-03-0

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3091-03-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3091-03-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,0,9 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3091-03:
(6*3)+(5*0)+(4*9)+(3*1)+(2*0)+(1*3)=60
60 % 10 = 0
So 3091-03-0 is a valid CAS Registry Number.

3091-03-0Relevant articles and documents

SYNTHESIS OF SOME EPITESTOSTERONE ANALOGUES

Chodounska, Hana,Slavikova, Barbora,Kasal, Alexander

, p. 435 - 443 (2007/10/02)

11β-Hydroxyandrost-4-ene-3,17-dione (III) was converted into a potential metabolite of epitestosterone - 11β,17α-dihydroxyandrost-4-en-3-one (II) in 5 steps, including the inversion of configuration of a 17β-hydroxy group.This inversion was not feasible in the preparation of the analogues X, XIV, XX, and XXII, where the 17α-hydroxy group was introduced first and only then was the rest of molecule modified.

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