105804-62-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105804-62-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,8,0 and 4 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 105804-62:
(8*1)+(7*0)+(6*5)+(5*8)+(4*0)+(3*4)+(2*6)+(1*2)=104
104 % 10 = 4
So 105804-62-4 is a valid CAS Registry Number.
105804-62-4Relevant articles and documents
Synthesis of 8-methylene-des-AB-cholestan-9-one by cholesterol degradation
Morzycki, Jacek W.,Jurek, Jaroslaw,Rodewald, Wladyslaw J.
, p. 1540 - 1543 (2007/10/02)
The short synthetic route from 3β-acetoxy-5β-methyl-19-norcholest-9(10)-en-6-one (1) to 8-methylene-des-AB-cholestan-9-one (8) is described.Compound 8 is a convenient intermediate for synthesis of relatives of vitamin D3 by the A CD route.