2/11/2004
FARM 2147 Fluoroquinolones
From ofloxacin to levofloxacin...

O
CH
3
-
H
3
C
N
C
O
O
-
O
N
N

F
Ofloxacin
is a racemic mixture

N
O
CH
3
H

The active form of ofloxacin is the (-) S isomer
Levofloxacin is the
pure (-) S isomer *
* Eur. pat.
206,283 to Daiichi, 1987