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Identification
NamePTI-901
Accession NumberDB05508
TypeSmall Molecule
GroupsInvestigational
Description

PTI-901 (low-dose naltrexone HCI) is Pain Therapeutics’ novel drug candidate to treat men or women with IBS. It is believed that an imbalance of opioid activity in the gut contributes to the symptoms that comprise IBS. Such an imbalance may be triggered by emotional stress, metabolic disorders or intrinsic release of opioids from neurons in the gut. PTI-901 is the first in a new class of drugs called opioid antagonists designed to restore the balance of opioid activity in the gut. By restoring this imbalance, PTI-901 relieves abdominal pain and other symptoms frequently observed in patients with IBS.

Structure
Thumb
SynonymsNot Available
External Identifiers Not Available
Approved Prescription ProductsNot Available
Approved Generic Prescription ProductsNot Available
Approved Over the Counter ProductsNot Available
Unapproved/Other Products Not Available
International BrandsNot Available
Brand mixturesNot Available
SaltsNot Available
CategoriesNot Available
UNIINot Available
CAS numberNot Available
WeightAverage: 377.862
Monoisotopic: 377.139385968
Chemical FormulaC20H24ClNO4
InChI KeyInChIKey=RHBRMCOKKKZVRY-ITLPAZOVSA-N
InChI
InChI=1S/C20H23NO4.ClH/c22-13-4-3-12-9-15-20(24)6-5-14(23)18-19(20,16(12)17(13)25-18)7-8-21(15)10-11-1-2-11;/h3-4,11,15,18,22,24H,1-2,5-10H2;1H/t15-,18+,19+,20-;/m1./s1
IUPAC Name
(1S,5R,13R,17S)-4-(cyclopropylmethyl)-10,17-dihydroxy-12-oxa-4-azapentacyclo[9.6.1.0¹,¹³.0⁵,¹⁷.0⁷,¹⁸]octadeca-7(18),8,10-trien-14-one hydrochloride
SMILES
Cl.[H][C@@]12OC3=C(O)C=CC4=C3[C@@]11CCN(CC3CC3)[C@]([H])(C4)[C@]1(O)CCC2=O
Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as morphinans. These are polycyclic compounds with a four-ring skeleton with three condensed six-member rings forming a partially hydrogenated phenanthrene moiety, one of which is aromatic while the two others are alicyclic.
KingdomOrganic compounds
Super ClassAlkaloids and derivatives
ClassMorphinans
Sub ClassNot Available
Direct ParentMorphinans
Alternative Parents
Substituents
  • Morphinan
  • Benzylisoquinoline
  • Phenanthrene
  • Isoquinolone
  • Tetralin
  • Benzofuran
  • Aralkylamine
  • Cyclohexanone
  • Alkyl aryl ether
  • Benzenoid
  • Piperidine
  • Tertiary alcohol
  • Cyclic alcohol
  • Tertiary aliphatic amine
  • Tertiary amine
  • Ketone
  • 1,2-aminoalcohol
  • Oxacycle
  • Azacycle
  • Organoheterocyclic compound
  • Ether
  • Hydrocarbon derivative
  • Hydrochloride
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Amine
  • Alcohol
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External DescriptorsNot Available
Pharmacology
IndicationInvestigated for use/treatment in irritable bowel syndrome (IBS).
Pharmacodynamics IBS is a chronic, painful abdominal disorder that leads to major changes in bowel habits. IBS causes some patients to have constipation, diarrhea or in some cases both. The cause of IBS is not known, and as yet there is no cure. People with chronic IBS may be unable to attend social events, hold a job, or travel away from home. Over 10 percent of the U.S. population suffers from IBS. For unknown reasons, IBS predominantly affects women. PTI-901 (low-dose naltrexone HCI) is Pain Therapeutics' novel drug candidate to treat men or women with IBS. It is believed that an imbalance of opioid activity in the gut contributes to the symptoms that comprise IBS. PTI-901 is the first in a new class of drugs called opioid antagonists designed to restore the balance of opioid activity in the gut. By restoring this imbalance, PTI-901 relieves abdominal pain and other symptoms frequently observed in patients with IBS
Mechanism of actionPTI-901 is the first in a new class of drugs called opioid antagonists designed to restore the balance of opioid activity in the gut
Related Articles
AbsorptionNot Available
Volume of distributionNot Available
Protein bindingNot Available
MetabolismNot Available
Route of eliminationNot Available
Half lifeNot Available
ClearanceNot Available
ToxicityNot Available
Affected organismsNot Available
PathwaysNot Available
SNP Mediated EffectsNot Available
SNP Mediated Adverse Drug ReactionsNot Available
ADMET
Predicted ADMET features
PropertyValueProbability
Human Intestinal AbsorptionNot AvailableNot Available
Blood Brain BarrierNot AvailableNot Available
Caco-2 permeableNot AvailableNot Available
P-glycoprotein substrateNot AvailableNot Available
P-glycoprotein inhibitor INot AvailableNot Available
P-glycoprotein inhibitor IINot AvailableNot Available
Renal organic cation transporterNot AvailableNot Available
CYP450 2C9 substrateNot AvailableNot Available
CYP450 2D6 substrateNot AvailableNot Available
CYP450 3A4 substrateNot AvailableNot Available
CYP450 1A2 substrateNot AvailableNot Available
CYP450 2C9 inhibitorNot AvailableNot Available
CYP450 2D6 inhibitorNot AvailableNot Available
CYP450 2C19 inhibitorNot AvailableNot Available
CYP450 3A4 inhibitorNot AvailableNot Available
CYP450 inhibitory promiscuityNot AvailableNot Available
Ames testNot AvailableNot Available
CarcinogenicityNot AvailableNot Available
BiodegradationNot AvailableNot Available
Rat acute toxicityNot AvailableNot applicable
hERG inhibition (predictor I)Not AvailableNot Available
hERG inhibition (predictor II)Not AvailableNot Available
ADMET data is predicted using admetSAR, a free tool for evaluating chemical ADMET properties. (23092397 )
Pharmacoeconomics
ManufacturersNot Available
PackagersNot Available
Dosage formsNot Available
PricesNot Available
PatentsNot Available
Properties
StateSolid
Experimental PropertiesNot Available
Predicted Properties
PropertyValueSource
logP1.36ChemAxon
pKa (Strongest Acidic)7.39ChemAxon
pKa (Strongest Basic)11.54ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area70 Å2ChemAxon
Rotatable Bond Count2ChemAxon
Refractivity91.5 m3·mol-1ChemAxon
Polarizability35.97 Å3ChemAxon
Number of Rings6ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Mass Spec (NIST)Not Available
SpectraNot Available
References
Synthesis ReferenceNot Available
General References
  1. Kariv R, Tiomny E, Grenshpon R, Dekel R, Waisman G, Ringel Y, Halpern Z: Low-dose naltreoxone for the treatment of irritable bowel syndrome: a pilot study. Dig Dis Sci. 2006 Dec;51(12):2128-33. Epub 2006 Nov 1. [PubMed:17080248 ]
External Links
ATC CodesNot Available
AHFS CodesNot Available
PDB EntriesNot Available
FDA labelNot Available
MSDSNot Available
Interactions
Drug InteractionsNot Available
Food InteractionsNot Available

Targets

Kind
Protein
Organism
Human
Pharmacological action
unknown
General Function:
Not Available
Specific Function:
Not Available
Gene Name:
SIGMAR1
Uniprot ID:
Q5T1J1
Molecular Weight:
14852.655 Da
Comments
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Drug created on November 18, 2007 11:25 / Updated on September 16, 2013 17:27