87417-22-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87417-22-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,4,1 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 87417-22:
(7*8)+(6*7)+(5*4)+(4*1)+(3*7)+(2*2)+(1*2)=149
149 % 10 = 9
So 87417-22-9 is a valid CAS Registry Number.
87417-22-9Relevant academic research and scientific papers
An improved synthesis of 24,24-difluoro-1α,25-dihydroxy-vitamin D3 from vitamin D2
Ando,Kondo,Koike,Takayama
, p. 1662 - 1664 (2007/10/02)
An improved synthesis of a highly potent vitamin D3 analog, 24,24-difluoro-1α,25-dihydroxyvitamin D3 has been accomplished. The total yield was 9.3% from inexpensive vitamin D2 in 11 steps.
