Lefamulin

Lefamulin, sold under the brand name Xenleta, is an antibiotic medication used it to treat adults with community-acquired bacterial pneumonia. It is taken by mouth or by injection into a vein.

Lefamulin
Clinical data
Trade namesXenleta
Other namesBC-3781
AHFS/Drugs.comMonograph
License data
Routes of
administration		Intravenous, by mouth
ATC code
Legal status
Legal status
Identifiers
  • (1S,2R,3S,4S,6R,7R,8R,14R)-3-Hydroxy-2,4,7,14-tetramethyl-9-oxo-4-vinyltricyclo[5.4.3.01,8]tetradec-6-yl {[(1R,2R,4R)-4-amino-2-hydroxycyclohexyl]sulfanyl}acetate
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
Chemical and physical data
FormulaC28H45NO5S
Molar mass507.73 g·mol−1
3D model (JSmol)
  • C[C@@H]1CC[C@@]23CCC(=O)[C@H]2[C@@]1([C@@H](C[C@@]([C@H]([C@@H]3C)O)(C)C=C)OC(=O)CS[C@@H]4CC[C@H](C[C@H]4O)N)C
  • InChI=1S/C28H45NO5S/c1-6-26(4)14-22(34-23(32)15-35-21-8-7-18(29)13-20(21)31)27(5)16(2)9-11-28(17(3)25(26)33)12-10-19(30)24(27)28/h6,16-18,20-22,24-25,31,33H,1,7-15,29H2,2-5H3/t16-,17+,18-,20-,21-,22-,24+,25+,26-,27+,28+/m1/s1
  • Key:KPVIXBKIJXZQJX-FCEONZPQSA-N

Relatively common side effects include diarrhea, nausea, pain at the site of injection, and liver inflammation. It is a pleuromutilin antibiotic that inhibits the large subunit of bacterial ribosomes.

Lefamulin was approved for medical use in the United States in August 2019, and in the European Union in July 2020.

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