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(20R)-5-methyl-19-nor-6-oxo-5β-pregn-9-ene-3β,20-diyl 3,20-dibenzoate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

218937-40-7

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218937-40-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 218937-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,9,3 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 218937-40:
(8*2)+(7*1)+(6*8)+(5*9)+(4*3)+(3*7)+(2*4)+(1*0)=157
157 % 10 = 7
So 218937-40-7 is a valid CAS Registry Number.

218937-40-7Relevant academic research and scientific papers

Hydrogenation of a tetrasubstituted double bond: Synthesis of 5-methyl-19-nor-5β-pregnanes

Kasal, Alexander,Polman, Jiri,Budesinsky, Milos

, p. 1549 - 1563 (2007/10/03)

Reduction of C=C and/or C=O bonds in 5-methyl-19-nor-5β-pregn-9-ene-3,20-dione (1) leads to saturated and unsaturated ketones and hydroxy ketones. The C=C reduction affords mainly 9β,10β and 9α,10β dihydro products. Reaction conditions of partial esterifi

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