143884-27-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143884-27-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,8 and 4 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 143884-27:
(8*1)+(7*4)+(6*3)+(5*8)+(4*8)+(3*4)+(2*2)+(1*7)=149
149 % 10 = 9
So 143884-27-9 is a valid CAS Registry Number.
143884-27-9Relevant articles and documents
An improved synthesis of 24,24-difluoro-1α,25-dihydroxyvitamin D3 from readily available vitamin D2
Ando,Koike,Takayama
, p. 189 - 192 (2007/10/02)
An improved synthesis of a highly potent vitamin D3 analog, 24,24-difluoro-1α,25-dihydroxyvitamin D3 (1b) has been accomplished via vitamin D2-SO2 adducts. The introduction of fluorine atoms was performed by tre