moleculefinder

Levofloxacin

C18H20FN3O4361.4 g/mol Calculated

Also called Levaquin, Iquix, Quixin and Floxin.

A fluoroquinolone antibiotic sold as Levaquin, used for pneumonia and urinary infections. Levofloxacin (C18H20FN3O4, 361 g/mol) is an antibiotic dispensed on prescription.

Sources and notes
  • The introductionfrom sourceMoleculeFinder curated
  • Other namesfrom sourceWikidataIts English label and aliases on Wikidata.
  • Formula and weightcomputedPubChem
  • 2D drawingcomputedPubChem structure, drawn by RDKit
  • 3D modelfrom sourcePubChem 3D conformerLoaded after the page has painted, and on a phone only when you ask for it; the 2D drawing shows until it arrives.

Where you encounter it

Dispensed on prescription, not sold on a shelf.

Sources and notes
  • The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.

Explore its structure

Choose a part to light it up.

A carbon carrying both a C=O and an O-H, written COOH. In water it gives up that hydrogen, which is what makes the molecule an acid.

From: standard chemistry.

Sources and notes
  • The drawingcomputedPubChem structure, drawn by RDKitThe page's one shipped drawing, with the chosen part lit in amber under it.
  • The partscomputedFound by ruleEach part is found by a chemical pattern, never picked by hand atom by atom; its words say where they come from.

Properties and sources

Calculated by PubChem

Molecular formula
C18H20FN3O4
Molecular weight
361.4 g/mol
XLogP3octanol/water, log units
−0.4
Polar surface areatopological
73.3 Ų
H-bond donors
1
H-bond acceptors
8
Rotatable bonds
2
Complexity
634

Reported Hazard label (GHS), ECHA via PubChem

Danger Irritant pictogram (GHS07) and Health hazard pictogram (GHS08); hazard statements H302, H317, H334, H361, H362

Reported Licence

The US Food and Drug Administration licenses Levofloxacin for human use (ANDA 077700, authorized December 20, 2010). Drugs@FDA

Groups it belongs to

Category
Prescription medicine
Family
Antibiotics
Chemical groups
Carboxylic Acids, Aromatics, Ethers, Halogenated
Elements
Fluorine, Nitrogen
Hazard classes
Irritant, Health hazard, GHS Danger
SMILESC[C@H]1COC2=C3N1C=C(C(=O)C3=CC(=C2N4CCN(CC4)C)F)C(=O)O

PubChem CID 149096 · Wikidata Q424193 · InChIKey GSDSWSVVBLHKDQ-JTQLQIEISA-N · Data refreshed

How MoleculeFinder sources and labels its data

Questions
What is Levofloxacin?
A fluoroquinolone antibiotic sold as Levaquin, used for pneumonia and urinary infections. Levofloxacin (C18H20FN3O4, 361 g/mol) is an antibiotic dispensed on prescription.
How toxic is Levofloxacin?
Its GHS hazard label carries the signal word Danger and the hazard pictograms Irritant and Health hazard. from source
What kind of molecule is Levofloxacin?
Levofloxacin has the formula C18H20FN3O4 and a molecular weight of 361.4 g/mol. MoleculeFinder files it under antibiotics, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
What else is Levofloxacin called?
Levofloxacin is also called Levaquin, Iquix, Quixin and Floxin. from source
Who licenses Levofloxacin as a medicine?
The US Food and Drug Administration licenses Levofloxacin for human use (ANDA 077700, authorized December 20, 2010). from source
Sources and notes
  • Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
  • Hazard labelfrom sourceECHA via PubChemThe label combines these classifications.
  • ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
  • Licencefrom sourceDrugs@FDARead 2026-10-21.
  • Data refreshedfrom sourceMoleculeFinder2026-11-09

Keep exploring

Also an antibioticCiprofloxacinC17H18FN3O3
Sources and notes
  • The same kind of moleculefrom sourceMoleculeFinder curated groupsA structural neighbour in the same family or type group; the line names the group in its own words.
  • The drawingscomputedPubChem structures, drawn by RDKit