144907-43-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 144907-43-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,9,0 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 144907-43:
(8*1)+(7*4)+(6*4)+(5*9)+(4*0)+(3*7)+(2*4)+(1*3)=137
137 % 10 = 7
So 144907-43-7 is a valid CAS Registry Number.
144907-43-7Relevant articles and documents
An improved synthesis of 24,24-difluoro-1α,25-dihydroxy-vitamin D3 from vitamin D2
Ando,Kondo,Koike,Takayama
, p. 1662 - 1664 (1992)
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.