73809-42-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73809-42-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,8,0 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 73809-42:
(7*7)+(6*3)+(5*8)+(4*0)+(3*9)+(2*4)+(1*2)=144
144 % 10 = 4
So 73809-42-4 is a valid CAS Registry Number.
73809-42-4Relevant articles and documents
Synthesis, conformational analysis, and biological-activity of the 1-α,25-dihydroxy-10,19-dihydrovitamin D3 isomers
Sicinski,Deluca
, p. 150 - 171 (2007/10/02)
The synthesis of the four 1α,25-dihydroxy-10,19-dihydrovitamin D3 stereoisomers (8-11) is described starting from 25-hydroxyvitamin D3(1c). Acetic acid-catalyzed cycloreversion of 1 α-hydroxylated 3,5-cyclovitamin D compound 14, prod