ofloxacin and its Impurities
A broad spectrum antibacterial agent used for the treatment against both Gram-positive and Gram-negative bacteria. Ofloxacin exists as a racemic mixture of levofloxacin and dextrofloxacin. It works by inhibiting the cell division.Reference standards of Ofloxacin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


Ofloxacin - Impurity F (Acetic Acid Salt)
4-[(3RS)-6-carboxy-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de]-1,4-benzoxazin-10-yl]-1-methylpiperazine 1-oxide Acetic Acid Salt
Catalogue No.:PA 15 02060
CAS :
1216511-73-7
Molecular Formula : C20H24FN3O7
Molecular Weight : 437.42


R-Ofloxacin ((R)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de (1478083)
R-Ofloxacin ((R)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de (1478083)
Catalogue No.:PA USP1478083
CAS :
100986-86-5
Molecular Formula : NA
Molecular Weight : NA


Ofloxacin Related Compound A (9-Fluoro-3-methyl-7-oxo-10-(piperazin-1-yl)-2,3-dihydro-7H-pyrido[1,2 (1478119)
Ofloxacin Related Compound A (9-Fluoro-3-methyl-7-oxo-10-(piperazin-1-yl)-2,3-dihydro-7H-pyrido[1,2 (1478119)
Catalogue No.:PA USP1478119
CAS :
82419-52-1
Molecular Formula : NA
Molecular Weight : NA


(3R)-9,10-Difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid
(3R)-9,10-Difluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid
Catalogue No.:PA 15 0021000
CAS :
110548-07-7
Molecular Formula : C13H9F2NO4
Molecular Weight : 281.21


3-Methyl-10-(4-methylpiperazin-1-yl)-9-(methylthio)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
3-Methyl-10-(4-methylpiperazin-1-yl)-9-(methylthio)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PAI 15 002001
CAS :
NA
Molecular Formula : C19H23N3O4S
Molecular Weight : 389.47


9-Bromo-10-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid
9-Bromo-10-fluoro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic Acid
Catalogue No.:PA 15 0021002
CAS :
1369498-86-1
Molecular Formula : C13H9BrFNO4
Molecular Weight : 342.12


10-Fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
10-Fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PAI 15 002002
CAS :
NA
Molecular Formula : C18H19FN4O6
Molecular Weight : 406.37


8-Amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
8-Amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PAI 15 002003
CAS :
NA
Molecular Formula : C18H21FN4O4
Molecular Weight : 376.39


9,10-Difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
9,10-Difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PAI 15 002004
CAS :
127625-16-5
Molecular Formula : C13H8F2N2O6
Molecular Weight : 326.21


Methyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Methyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002013
CAS :
889110-57-0
Molecular Formula : C14H11F2NO4
Molecular Weight : 295.24


Methyl 9,10-difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Methyl 9,10-difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002014
CAS :
NA
Molecular Formula : C14H10F2N2O6
Molecular Weight : 340.24


Methyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Methyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002015
CAS :
NA
Molecular Formula : C19H21FN4O6
Molecular Weight : 420.4


Methyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Methyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002016
CAS :
NA
Molecular Formula : C19H23FN4O4
Molecular Weight : 390.42


Methyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Methyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002017
CAS :
NA
Molecular Formula : C19H22FN3O4
Molecular Weight : 375.4


Ethyl 10-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 10-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002021
CAS :
2734011-54-0
Molecular Formula : C15H14FNO4
Molecular Weight : 291.28


Benzyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Benzyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002024
CAS :
NA
Molecular Formula : C25H25FN4O6
Molecular Weight : 496.5


Benzyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Benzyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002025
CAS :
NA
Molecular Formula : C25H27FN4O4
Molecular Weight : 466.51


Benzyl 8-bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Benzyl 8-bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002026
CAS :
NA
Molecular Formula : C25H25BrFN3O4
Molecular Weight : 530.39


8-Bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
8-Bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PAI 15 002027
CAS :
NA
Molecular Formula : C18H19BrFN3O4
Molecular Weight : 440.27


Ethyl 8-bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 8-bromo-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002033
CAS :
NA
Molecular Formula : C20H23BrFN3O4
Molecular Weight : 468.32


Ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 9,10-difluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002034
CAS :
82419-34-9
Molecular Formula : C15H13F2NO4
Molecular Weight : 309.27


Ethyl 9,10-difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 9,10-difluoro-3-methyl-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002035
CAS :
2172959-63-4
Molecular Formula : C15H12F2N2O6
Molecular Weight : 354.27


Ethyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-8-nitro-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002036
CAS :
2172959-64-5
Molecular Formula : C20H23FN4O6
Molecular Weight : 434.42


Ethyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 8-amino-10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002037
CAS :
2172959-65-6
Molecular Formula : C20H25FN4O4
Molecular Weight : 404.44


Ethyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Ethyl 10-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate
Catalogue No.:PAI 15 002038
CAS :
2172959-66-7
Molecular Formula : C20H24FN3O4
Molecular Weight : 389.43


9-Fluoro-3-methyl-10-(4-nitrosopiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
9-Fluoro-3-methyl-10-(4-nitrosopiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PA 15 0021004
CAS :
NA
Molecular Formula : C17H17FN4O5
Molecular Weight : 376.34


10-Amino-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
10-Amino-9-fluoro-3-methyl-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic Acid
Catalogue No.:PA 15 0021005
CAS :
86794-33-4
Molecular Formula : C13H11FN2O4
Molecular Weight : 278.24