157120-46-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157120-46-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,1,2 and 0 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 157120-46:
(8*1)+(7*5)+(6*7)+(5*1)+(4*2)+(3*0)+(2*4)+(1*6)=112
112 % 10 = 2
So 157120-46-2 is a valid CAS Registry Number.
157120-46-2Relevant academic research and scientific papers
7a-KETO-B-HOMOTESTOSTERONE AND 7a-KETO-B-HOMOEPITESTOSTERONE
Kohout, Ladislav,Kasal, Alexander
, p. 649 - 657 (2007/10/02)
Synthesis of 7a-keto-B-homotestosterone (IX) and its 17α-isomer XIV from 3β-acetoxy-17β(or α)-benzoyloxyandrost-5-en-7-one (I or X) is described.The key reaction is the enlargement of the ring B in reaction with diazomethane in the presence of aluminium c
