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Record Information
StatusExpected but not Quantified
Creation Date2012-09-06 15:16:51 UTC
Update Date2020-02-26 21:40:46 UTC
Secondary Accession Numbers
  • HMDB15005
Metabolite Identification
Common NameRitodrine
DescriptionRitodrine, also known as du-21220Ritodrine or prepar, belongs to the class of organic compounds known as phenethylamines. Phenethylamines are compounds containing a phenethylamine moiety, which consists of a phenyl group substituted at the second position by an ethan-1-amine. Ritodrine is a short-acting β2 adrenoreceptor agonist — a class of medication used for smooth muscle relaxation (other similar drugs are used in asthma or other pulmonary diseases such as salbutamol (albuterol)). Ritodrine (trade name Yutopar) is a tocolytic drug used to stop premature labor. Ritodrine is a drug. Since ritodrine has a bulky N-substituent, it has high β2 selectivity. Ritodrine is a very strong basic compound (based on its pKa). Also, the 4-hydroxy group on the benzene ring is important for activity as it is needed to form hydrogen bonds. Since it is β2-selective it is used for premature labor. It has also been associated with postpartum bleeding. Most side effects of β2 agonists result from their concurrent β1 activity, and include increase in heart rate, rise in systolic pressure, decrease in diastolic pressure, chest pain secondary to myocardial infarction, and arrhythmia. The passage of β agonists through the placenta does occur and may be responsible for fetal tachycardia, as well as hypoglycemia or hyperglycemia at birth. Patients with type 2 diabetes, high blood pressure or migraines should bring this to their doctor's attention before receiving care.
Astra brand OF ritodrine hydrochlorideHMDB
Janssen brand OF ritodrine hydrochlorideHMDB
Solvay brand OF ritodrine hydrochlorideHMDB
Ritodrine hydrochlorideHMDB
Hydrochloride, ritodrineHMDB
Pre parHMDB
Chemical FormulaC17H21NO3
Average Molecular Weight287.3535
Monoisotopic Molecular Weight287.152143543
IUPAC Name4-(2-{[(1R,2S)-1-hydroxy-1-(4-hydroxyphenyl)propan-2-yl]amino}ethyl)phenol
Traditional NamePrePar
CAS Registry Number26652-09-5
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as phenethylamines. Phenethylamines are compounds containing a phenethylamine moiety, which consists of a phenyl group substituted at the second position by an ethan-1-amine.
KingdomOrganic compounds
Super ClassBenzenoids
ClassBenzene and substituted derivatives
Sub ClassPhenethylamines
Direct ParentPhenethylamines
Alternative Parents
  • Phenethylamine
  • Phenylpropane
  • Phenol
  • 1-hydroxy-2-unsubstituted benzenoid
  • Aralkylamine
  • Secondary alcohol
  • 1,2-aminoalcohol
  • Secondary amine
  • Secondary aliphatic amine
  • Amine
  • Aromatic alcohol
  • Alcohol
  • Organic nitrogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Hydrocarbon derivative
  • Organopnictogen compound
  • Organic oxygen compound
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors

Biological location:


Industrial application:

Physical Properties
Experimental Properties
Melting Point88 - 90 °CNot Available
Boiling PointNot AvailableNot Available
Water Solubility0.18 g/LNot Available
LogP2.4Not Available
Predicted Properties
Water Solubility0.18 g/LALOGPS
pKa (Strongest Acidic)9.15ChemAxon
pKa (Strongest Basic)9.81ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count4ChemAxon
Polar Surface Area72.72 ŲChemAxon
Rotatable Bond Count6ChemAxon
Refractivity83.02 m³·mol⁻¹ChemAxon
Polarizability31.56 ųChemAxon
Number of Rings2ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-00di-2900000000-3805a42a3d5fd6ba5125Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (3 TMS) - 70eV, Positivesplash10-000i-3812900000-413b9134e83bd9eb68eaSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00dr-0290000000-02edb26ad804521cb8e4Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-0950000000-0e89a0ff051f0d547e32Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-05fr-3900000000-a099c03cdf184ee84188Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-0190000000-6866c99f3f35731b7230Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-00kr-0590000000-8f1447c41913cfe1e6a8Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-059f-2900000000-934b4f1329ef64eb84b7Spectrum
Biological Properties
Cellular Locations
  • Cytoplasm
  • Membrane
Biospecimen Locations
  • Blood
  • Urine
Tissue LocationsNot Available
Normal Concentrations
BloodExpected but not QuantifiedNot QuantifiedNot AvailableNot AvailableTaking drug identified by DrugBank entry DB00867 details
UrineExpected but not QuantifiedNot QuantifiedNot AvailableNot AvailableTaking drug identified by DrugBank entry DB00867 details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB00867
Phenol Explorer Compound IDNot Available
FooDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID30971
KEGG Compound IDC07239
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkRitodrine
METLIN IDNot Available
PubChem Compound33572
PDB IDNot Available
ChEBI ID147138
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB ID
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available


General function:
Involved in oxidoreductase activity
Specific function:
Catalyzes the oxidative decarboxylation of 6-phosphogluconate to ribulose 5-phosphate and CO(2), with concomitant reduction of NADP to NADPH (By similarity).
Gene Name:
Uniprot ID:
Molecular weight:
  1. Akkemik E, Budak H, Ciftci M: Effects of some drugs on human erythrocyte 6-phosphogluconate dehydrogenase: an in vitro study. J Enzyme Inhib Med Chem. 2010 Aug;25(4):476-9. doi: 10.3109/14756360903257900. [PubMed:20235752 ]
  2. Berman HM, Westbrook J, Feng Z, Gilliland G, Bhat TN, Weissig H, Shindyalov IN, Bourne PE: The Protein Data Bank. Nucleic Acids Res. 2000 Jan 1;28(1):235-42. [PubMed:10592235 ]
General function:
Involved in G-protein coupled receptor protein signaling pathway
Specific function:
Beta-adrenergic receptors mediate the catecholamine- induced activation of adenylate cyclase through the action of G proteins. The beta-2-adrenergic receptor binds epinephrine with an approximately 30-fold greater affinity than it does norepinephrine
Gene Name:
Uniprot ID:
Molecular weight:
  1. Tanaka N, Tamai T, Mukaiyama H, Hirabayashi A, Muranaka H, Akahane S, Miyata H, Akahane M: Discovery of novel N-phenylglycine derivatives as potent and selective beta(3)-adrenoceptor agonists for the treatment of frequent urination and urinary incontinence. J Med Chem. 2001 Apr 26;44(9):1436-45. [PubMed:11311067 ]
  2. Schwarz MK, Page P: Preterm labour: an overview of current and emerging therapeutics. Curr Med Chem. 2003 Aug;10(15):1441-68. [PubMed:12871140 ]
  3. Lye SJ, Dayes BA, Freitag CL, Brooks J, Casper RF: Failure of ritodrine to prevent preterm labor in the sheep. Am J Obstet Gynecol. 1992 Nov;167(5):1399-408. [PubMed:1332478 ]
  4. Bianchetti A, Manara L: In vitro inhibition of intestinal motility by phenylethanolaminotetralines: evidence of atypical beta-adrenoceptors in rat colon. Br J Pharmacol. 1990 Aug;100(4):831-9. [PubMed:1976401 ]
  5. Lenselink DR, Kuhlmann RS, Lawrence JM, Kolesari GL: Cardiovascular teratogenicity of terbutaline and ritodrine in the chick embryo. Am J Obstet Gynecol. 1994 Aug;171(2):501-6. [PubMed:8059831 ]
  6. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [PubMed:11752352 ]