Cas 139501-06-7,9α,11α-Epoxypregna-4-en-17α-ol-3-on-20-yne

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Check Digit Verification of cas no

The CAS Registry Mumber 139501-06-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,0 and 1 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 139501-06:
(8*1)+(7*3)+(6*9)+(5*5)+(4*0)+(3*1)+(2*0)+(1*6)=117
117 % 10 = 7
So 139501-06-7 is a valid CAS Registry Number.

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139501-06-7Relevant academic research and scientific papers

TRANSFORMED STEROIDS. 184. PATHWAYS FOR THE USE OF 17α-PREGNA-4,9-DIEN-3-ON-17β-OL-20-YNE IN THE SYNTHESIS OF 9,11-DISUBSTITUTED PREGNANES

Turuta, A. M.,Fadeeva, T. M.,Kamernitskii, A. V.,Hu, Lyu Dyk

, p. 638 - 643 (2007/10/02)

A study was carried out on pathways for the conversion of 17α-pregna-4,9-dien-3-on-17β-ol-20-yne to 9ξ,11ξ-epoxypregn-4-en-17α-ol-3-on-20-ynes and their Δ16- and 16α,17α-epoxy derivatives, which are valuable intermediates in reported schemes for the synthesis of corticosteroids.

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