128133-58-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128133-58-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,1,3 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128133-58:
(8*1)+(7*2)+(6*8)+(5*1)+(4*3)+(3*3)+(2*5)+(1*8)=114
114 % 10 = 4
So 128133-58-4 is a valid CAS Registry Number.
128133-58-4Relevant academic research and scientific papers
Fluorinated amino acids Part 3: Synthesis of β-difluoromethyl-m-tyrosine
Sabol, Jeffrey S.,Brake, Nicholas W.,McDonald, Ian A.
, p. 1821 - 1824 (2007/10/02)
The difluoromethyl carboxylic acid S-(+)-9, was synthesized to assign the absolute configuration of diastereomers 2a and 2b, and the completion of the synthesis of β-difluoromethyl-m-tyrosines 1a, b is reported.
