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Record Information
Creation Date2012-09-06 15:16:52 UTC
Update Date2016-02-11 01:33:25 UTC
Secondary Accession NumbersNone
Metabolite Identification
Common NameDalfopristin
DescriptionDalfopristin is a combination of two antibiotics (Dalfopristin and quinupristin) used to treat infections by staphylococci and by vancomycin-resistant Enterococcus faecium. It is not effective against Enterococcus faecalis infections. Dalfopristin inhibits the early phase of protein synthesis in the bacterial ribosome and quinupristin inhibits the late phase of protein synthesis.
SynonymsNot Available
Chemical FormulaC34H50N4O9S
Average Molecular Weight690.847
Monoisotopic Molecular Weight690.329849908
IUPAC Name(6R,10R,11R,12Z,17Z,19Z,21S)-6-[2-(diethylamino)ethanesulfonyl]-21-hydroxy-11,19-dimethyl-10-(propan-2-yl)-9,26-dioxa-3,15,28-triazatricyclo[³,⁷]octacosa-1(27),12,17,19,25(28)-pentaene-2,8,14,23-tetrone
Traditional Namedalfopristin
CAS Registry Number112362-50-2
InChI Identifier
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as macrolide lactams. These are cyclic polyketides containing both a cyclic amide and a cyclic ester group.
KingdomOrganic compounds
Super ClassPhenylpropanoids and polyketides
ClassMacrolide lactams
Sub ClassNot Available
Direct ParentMacrolide lactams
Alternative Parents
  • Macrolide lactam
  • Macrolactam
  • Alpha-amino acid ester
  • Heteroaromatic compound
  • Sulfonyl
  • Sulfone
  • Pyrrolidine
  • Oxazole
  • Azole
  • Cyclic ketone
  • Tertiary aliphatic amine
  • Tertiary amine
  • Secondary carboxylic acid amide
  • Secondary alcohol
  • Lactone
  • Lactam
  • Ketone
  • Carboxylic acid ester
  • Carboxamide group
  • Oxacycle
  • Azacycle
  • Organoheterocyclic compound
  • Monocarboxylic acid or derivatives
  • Carboxylic acid derivative
  • Carboxylic acid amide
  • Hydrocarbon derivative
  • Organosulfur compound
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Amine
  • Alcohol
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available
StatusExpected but not Quantified
  • Drug
  • Anti-Bacterial Agents
  • Antibacterial Agents
  • Pharmaceutical
Cellular locations
  • Membrane
Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water Solubility7.16e-02 g/LNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.072 mg/mLALOGPS
pKa (Strongest Acidic)11.38ChemAxon
pKa (Strongest Basic)7.09ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count9ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area176.42 Å2ChemAxon
Rotatable Bond Count7ChemAxon
Refractivity182.84 m3·mol-1ChemAxon
Polarizability73.8 Å3ChemAxon
Number of Rings3ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, NegativeNot Available
Biological Properties
Cellular Locations
  • Membrane
Biofluid Locations
  • Blood
  • Urine
Tissue LocationNot Available
PathwaysNot Available
Normal Concentrations
BloodExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB01764
  • Not Applicable
UrineExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB01764
  • Not Applicable
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB01764
DrugBank Metabolite IDNot Available
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4940480
KEGG Compound IDC08033
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkDalfopristin
NuGOwiki LinkHMDB15566
Metagene LinkHMDB15566
METLIN IDNot Available
PubChem Compound21943991
PDB IDNot Available
ChEBI IDNot Available
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Lamb HM, Figgitt DP, Faulds D: Quinupristin/dalfopristin: a review of its use in the management of serious gram-positive infections. Drugs. 1999 Dec;58(6):1061-97. [10651391 ]
  2. Paradisi F, Corti G, Messeri D: Antistaphylococcal (MSSA, MRSA, MSSE, MRSE) antibiotics. Med Clin North Am. 2001 Jan;85(1):1-17. [11190346 ]
  3. Allington DR, Rivey MP: Quinupristin/dalfopristin: a therapeutic review. Clin Ther. 2001 Jan;23(1):24-44. [11219478 ]
  4. Manzella JP: Quinupristin-dalfopristin: a new antibiotic for severe gram-positive infections. Am Fam Physician. 2001 Dec 1;64(11):1863-6. [11764864 ]


General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4-hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,8-cineole 2-exo-monooxygenase. The enzyme also hydroxylates etoposide.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Rubinstein E, Prokocimer P, Talbot GH: Safety and tolerability of quinupristin/dalfopristin: administration guidelines. J Antimicrob Chemother. 1999 Sep;44 Suppl A:37-46. [10511396 ]
  2. Lamb HM, Figgitt DP, Faulds D: Quinupristin/dalfopristin: a review of its use in the management of serious gram-positive infections. Drugs. 1999 Dec;58(6):1061-97. [10651391 ]
  3. Bearden DT: Clinical pharmacokinetics of quinupristin/dalfopristin. Clin Pharmacokinet. 2004;43(4):239-52. [15005638 ]
  4. Delgado G Jr, Neuhauser MM, Bearden DT, Danziger LH: Quinupristin-dalfopristin: an overview. Pharmacotherapy. 2000 Dec;20(12):1469-85. [11130220 ]