fidaxomicin   Click here for help

GtoPdb Ligand ID: 10909

Synonyms: Dificid® | Dificlir® | lipiarmycin | OPT-80 | PAR-101 | tiacumicin B
Approved drug PDB Ligand
fidaxomicin is an approved drug (EMA & FDA (2011))
Compound class: Synthetic organic
Comment: Fidaxomicin is a narrow-spectrum, semisynthetic, macrolide antibacterial. It was isolated from the hamdenensis subspecies of actinomycete Dactylosporangium aurantiacum.
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 16
Hydrogen bond donors 7
Rotatable bonds 15
Topological polar surface area 266.66
Molecular weight 1056.43
XLogP 5.76
No. Lipinski's rules broken 4
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES CO[C@@H]1[C@H](OC/C/2=C\C=C\C[C@H](O)/C(=C/[C@H](CC)[C@H](/C(=C/C(=C/C[C@H](OC2=O)[C@H](O)C)/C)/C)O[C@@H]2OC(C)(C)[C@H]([C@@H]([C@@H]2O)O)OC(=O)C(C)C)/C)O[C@@H]([C@H]([C@@H]1O)OC(=O)c1c(O)c(Cl)c(c(c1CC)Cl)O)C
Isomeric SMILES CO[C@@H]1[C@H](OC/C/2=C\C=C\C[C@H](O)/C(=C/[C@H](CC)[C@H](/C(=C/C(=C/C[C@H](OC2=O)[C@H](O)C)/C)/C)O[C@@H]2OC(C)(C)[C@H]([C@@H]([C@@H]2O)O)OC(=O)C(C)C)/C)O[C@@H]([C@H]([C@@H]1O)OC(=O)c1c(O)c(Cl)c(c(c1CC)Cl)O)C
InChI InChI=1S/C52H74Cl2O18/c1-13-30-22-26(6)33(56)18-16-15-17-31(23-66-51-45(65-12)42(61)44(29(9)67-51)69-49(64)35-32(14-2)36(53)39(58)37(54)38(35)57)48(63)68-34(28(8)55)20-19-25(5)21-27(7)43(30)70-50-41(60)40(59)46(52(10,11)72-50)71-47(62)24(3)4/h15-17,19,21-22,24,28-30,33-34,40-46,50-51,55-61H,13-14,18,20,23H2,1-12H3/b16-15+,25-19+,26-22+,27-21+,31-17+/t28-,29-,30+,33+,34+,40-,41+,42+,43+,44-,45+,46+,50-,51-/m1/s1
InChI Key ZVGNESXIJDCBKN-UUEYKCAUSA-N
No information available.
Summary of Clinical Use Click here for help
Orally administered fidaxomicin is minimally absorbed into the systemic circulation, and principally acts locally in the gastrointestinal tract. It is used to treat Clostridium difficile-associated diarrhea (CDAD). The MIC90 for fidaxomicin is four times less than that of vancomycin, which was the primary drug of choice for C. difficile infection prior to fidaxomicin's approval. As of January 2020, fidaxomicin has FDA approval for use in children aged ≥6 months for CDAD.
External links Click here for help
For extended ADME data see the following:

Electronic Medicines Compendium (eMC)
Drugs.com
European Medicines Agency (EMA)