199525-64-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 199525-64-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,5,2 and 5 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 199525-64:
(8*1)+(7*9)+(6*9)+(5*5)+(4*2)+(3*5)+(2*6)+(1*4)=189
189 % 10 = 9
So 199525-64-9 is a valid CAS Registry Number.
199525-64-9Relevant academic research and scientific papers
A short, efficient synthesis of monofluoro ketomethylene peptide isostere core units
Hoffman, Robert V.,Saenz, James E.
, p. 8469 - 8472 (2007/10/03)
Monofluoro ketomethylene peptide isosteres can be prepared by a four step sequence from carboxylic acids in satisfactory overall yields (30-60%). Fluorine is introduced by electrophilic fluorination of a β-ketoester enolate with SelectFluor(TM).
