Cas 104221-34-3,3β-Acetoxy-21-benzoyloxy-5-pregnen-20-on

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Check Digit Verification of cas no

The CAS Registry Mumber 104221-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,2,2 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 104221-34:
(8*1)+(7*0)+(6*4)+(5*2)+(4*2)+(3*1)+(2*3)+(1*4)=63
63 % 10 = 3
So 104221-34-3 is a valid CAS Registry Number.

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104221-34-3Relevant academic research and scientific papers

New Synthesis of the Corticosterone Side-Chain

Solyom, Sandor,Szilagyi, Katalin,Toldy, Lajos

, p. 153 - 160 (2007/10/02)

Condensation reactions between azlactone 2 and 17-ketosteroids 1 followed by opening of the azlactone ring with sodium methanolate yields methyl 20-benzoylamino-17(20)-pregnen-21-oates 6.Reduction of the ester and subsequent hydrolysis produce compounds with the corticosterone side-chain as well as a ring-closed product of new type.

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