172657-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172657-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,6,5 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 172657-12:
(8*1)+(7*7)+(6*2)+(5*6)+(4*5)+(3*7)+(2*1)+(1*2)=144
144 % 10 = 4
So 172657-12-4 is a valid CAS Registry Number.
172657-12-4Relevant articles and documents
Synthesis of fluoro- and polyfluoro-veratraldehydes by electrophilic fluorination
Nie, Jun-ying,Kirk, Kenneth L.
, p. 297 - 302 (2007/10/03)
Lithiation of oxazolines derived from fluorinated veratric acid, followed by electrophilic fluorination and subsequent reductive oxazoline cleavage, provides a convenient route to di- and tri-fluoroveratraldehydes.Similarly, 4-fluoroveratrol was converted