You are using an unsupported browser. Please upgrade your browser to a newer version to get the best experience on Human Metabolome Database.
Record Information
StatusExpected but not Quantified
Creation Date2012-09-06 15:16:52 UTC
Update Date2017-12-07 02:51:50 UTC
Secondary Accession Numbers
  • HMDB15566
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
  • Alpha-amino acid ester
  • Macrolactam
  • Alpha-amino acid or derivatives
  • 2-heteroaryl carboxamide
  • Azole
  • Oxazole
  • Pyrrolidine
  • Sulfone
  • Sulfonyl
  • Tertiary carboxylic acid amide
  • Cyclic carboximidic acid
  • Heteroaromatic compound
  • Cyclic ketone
  • Tertiary aliphatic amine
  • Lactam
  • Tertiary amine
  • Amino acid or derivatives
  • Lactone
  • Secondary alcohol
  • Ketone
  • Carboxylic acid ester
  • Carboxamide group
  • Propargyl-type 1,3-dipolar organic compound
  • Carboxylic acid derivative
  • Monocarboxylic acid or derivatives
  • Organic 1,3-dipolar compound
  • Organoheterocyclic compound
  • Azacycle
  • Oxacycle
  • Hydrocarbon derivative
  • Organopnictogen compound
  • Organic oxide
  • Organonitrogen compound
  • Organooxygen compound
  • Organosulfur compound
  • Organic nitrogen compound
  • Alcohol
  • Organic oxygen compound
  • Amine
  • Carbonyl group
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available

Biological location:


  Biofluid and excreta:




Industrial application:

  Household products:

    Antimicrobial agent:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water Solubility0.072 g/LNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.072 g/LALOGPS
pKa (Strongest Acidic)11.38ChemAxon
pKa (Strongest Basic)7.09ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count9ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area176.42 ŲChemAxon
Rotatable Bond Count7ChemAxon
Refractivity182.84 m³·mol⁻¹ChemAxon
Polarizability73.8 ųChemAxon
Number of Rings3ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash Key
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0ug1-9500033000-e0c9e20be04ed61ad809View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-000i-0907003000-4f1335836157942eea95View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-052r-9410323000-193f7a7ada018cf8941dView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0uxr-1923000000-0fe3cf1d8fd8c674fdaeView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-0301219000-697058b835411e2f2448View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-004i-5900034000-d7f654c14264c78bfbeeView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-01t9-8954300000-adca2174d052186714faView in MoNA
Biological Properties
Cellular Locations
  • Membrane
Biofluid Locations
  • Blood
  • Urine
Tissue LocationNot Available
PathwaysNot Available
Normal Concentrations
BloodExpected but not Quantified Not AvailableNot AvailableTaking drug identified by DrugBank entry DB01764 details
UrineExpected but not Quantified Not AvailableNot AvailableTaking drug identified by DrugBank entry DB01764 details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4940480
KEGG Compound IDC08033
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkDalfopristin
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. [PubMed:10651391 ]
  2. Paradisi F, Corti G, Messeri D: Antistaphylococcal (MSSA, MRSA, MSSE, MRSE) antibiotics. Med Clin North Am. 2001 Jan;85(1):1-17. [PubMed:11190346 ]
  3. Allington DR, Rivey MP: Quinupristin/dalfopristin: a therapeutic review. Clin Ther. 2001 Jan;23(1):24-44. [PubMed:11219478 ]
  4. Manzella JP: Quinupristin-dalfopristin: a new antibiotic for severe gram-positive infections. Am Fam Physician. 2001 Dec 1;64(11):1863-6. [PubMed: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. [PubMed: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. [PubMed:10651391 ]
  3. Bearden DT: Clinical pharmacokinetics of quinupristin/dalfopristin. Clin Pharmacokinet. 2004;43(4):239-52. [PubMed:15005638 ]
  4. Delgado G Jr, Neuhauser MM, Bearden DT, Danziger LH: Quinupristin-dalfopristin: an overview. Pharmacotherapy. 2000 Dec;20(12):1469-85. [PubMed:11130220 ]