139058-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139058-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,0,5 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139058-99:
(8*1)+(7*3)+(6*9)+(5*0)+(4*5)+(3*8)+(2*9)+(1*9)=154
154 % 10 = 4
So 139058-99-4 is a valid CAS Registry Number.
139058-99-4Relevant articles and documents
An enzymatic route to florfenicol
Clark,Fischer,Schumacher
, p. 891 - 894 (2007/10/02)
Racemic ethyl threo-3-14-methylthiophenyl)serinate is resolved by enzymatic hydrolysis using protease from Streptomyces griseus and both stereoisomers are converted to D-threo-4,5-dihydro-5-(4-methylsulfonylphenyl)-2-phenyl-4-oxazolemethan ol, thereby giving a formal synthesis of florfenicol.