moleculefinder

Oseltamivir

C16H28N2O4312.4 g/mol Calculated

Also called ebilfumin and Tamvir.

The antiviral sold as Tamiflu, used for influenza. It was originally derived from shikimic acid in star anise.

Sources and notes
  • The introductionfrom sourceMoleculeFinder curated
  • Other namesfrom sourcePubChem / 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. Oseltamivir on the product labels we hold.

Medicines

TamifluAdded by the makerActive ingredient

Every product and list we hold

Sources and notes
  • The product labels and their strengthsfrom sourceDailyMed (FDA label)Each label lists the molecule as an ingredient, and an active ingredient at the strength shown.
  • How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
  • The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.

Explore its structure

Choose a part to light it up.

A C=O joined through an oxygen to another carbon, the link an acid and an alcohol make when they combine. Water can split it back into the two.

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
C16H28N2O4
Molecular weight
312.4 g/mol
XLogP3octanol/water, log units
1.1
Polar surface areatopological
90.7 Ų
H-bond donors
2
H-bond acceptors
5
Rotatable bonds
8
Complexity
418

Reported Licence

The US Food and Drug Administration licenses Oseltamivir for human use (NDA 021087, authorized October 27, 1999), as Tamiflu. Drugs@FDA

Groups it belongs to

Category
Prescription medicine
Family
Antivirals
Chemical groups
Amines, Esters, Amides, Ethers
Elements
Nitrogen
SMILESCCC(CC)O[C@@H]1C=C(C[C@@H]([C@H]1NC(=O)C)N)C(=O)OCC

PubChem CID 65028 · Wikidata Q211509 · InChIKey VSZGPKBBMSAYNT-RRFJBIMHSA-N · Data refreshed

How MoleculeFinder sources and labels its data

Questions
What is Oseltamivir?
The antiviral sold as Tamiflu, used for influenza. It was originally derived from shikimic acid in star anise.
What kind of molecule is Oseltamivir?
Oseltamivir has the formula C16H28N2O4 and a molecular weight of 312.4 g/mol. MoleculeFinder files it under antivirals, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
Who licenses Oseltamivir as a medicine?
The US Food and Drug Administration licenses Oseltamivir for human use (NDA 021087, authorized October 27, 1999), as Tamiflu. from source
Sources and notes
  • Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
  • Licencefrom sourceDrugs@FDARead 2026-10-21.
  • Data refreshedfrom sourceMoleculeFinder2026-11-09