131496-31-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131496-31-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,4,9 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 131496-31:
(8*1)+(7*3)+(6*1)+(5*4)+(4*9)+(3*6)+(2*3)+(1*1)=116
116 % 10 = 6
So 131496-31-6 is a valid CAS Registry Number.
131496-31-6Relevant 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 (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.