105817-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105817-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,8,1 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 105817-42:
(8*1)+(7*0)+(6*5)+(5*8)+(4*1)+(3*7)+(2*4)+(1*2)=113
113 % 10 = 3
So 105817-42-3 is a valid CAS Registry Number.
105817-42-3Relevant 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.
