2/11/2004
FARM 2147 Fluoroquinolones
20
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