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19-Norpregn-4-ene-3,20-dione, 9-bromo-11-fluoro-, (11.beta.)- is a complex organic compound with the molecular formula C20H25BrFNO2. It is a derivative of norpregn-4-ene-3,20-dione, which is a steroidal structure. The compound is characterized by the presence of a bromine atom at the 9th position and a fluorine atom at the 11th position, with the 11-beta configuration indicating the specific orientation of the fluorine atom in the molecule. This chemical is significant in the field of pharmaceuticals and biochemistry, often used in the synthesis of various steroidal drugs and hormones due to its unique structural features.

742-90-5

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742-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 742-90-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,4 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 742-90:
(5*7)+(4*4)+(3*2)+(2*9)+(1*0)=75
75 % 10 = 5
So 742-90-5 is a valid CAS Registry Number.

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