Natamycin

DB00826ApprovedInvestigationalSmall moleculePolyene Antimicrobial

Natamycin is a macrolide antifungal used to treat fungal infections of the eye. Amphoteric macrolide antifungal antibiotic from Streptomyces natalensis or S. chattanoogensis.

Chemical structure of Natamycin
Mechanism
Curator reviewed
Primary indication
For the treatment of fungal blepharitis, conjunctivitis, and keratitis caused by susceptible organisms including Fusarium solani keratitis.Curator reviewed · 3 structured indications
Formula / weight
C33H47NO13 · 665.733 g/mol (avg)
First approval
United States, 1980
Also known as
Pimaracin · Pimaricin
Code names
A-5283 · Antibiotic A-5283 · CL 12,625 · E-235 · INS-235 · INS NO.235
Brand names
  • Natacyn

Resolves to

Structure
InChIKeyNCXMLFZGDNKEPB-FFPOYIOWSA-NSMILES[H][C@@]12C[C@H](O)C[C@]3(O)C[C@H](O)[C@@H](C(O)=O)[C@]([H])(C[C@@H](O[C@]4([H])O[C@H](C)[C@@H](O)[C@H](N)[C@@H]4O)\C=C\C=C\C=C\C=C\C[C@@H](C)OC(=O)\C=C\[C@@]1([H])O2)O3

What you can answer from here — as of September 23, 2026

1Protein targetEach mapped to UniProt, with action and pharmacological action
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38Drug interactionsStructured to mechanism, not free text
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12Clinical trialsPhase, status and sponsor resolved per trial
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3Structured indicationsCondition, population, route and combination as fields, not prose
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12Marketed productsAcross 7 countries and 10 labellers
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5ATC codesIncluding every combination product, plus 19 drug categories
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3+ReferencesStructured and connected to the statements they support
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Which other approved drugs treat the same conditions as Natamycin, and which companies have late-stage candidates in those indications?

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