oxycodegol   Click here for help

GtoPdb Ligand ID: 10652

Synonyms: loxicodegol (deleted INN) | NKTR-181 | NKTR181
Compound class: Synthetic organic
Comment: Oxycodegol (NKTR-181; Nektar Therapeutics) is a μ-opioid receptor agonist analgesic [3]. It was designed to enter the brain slowly, so as to reduce CNS-mediated side effects and abuse potential.
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 9
Hydrogen bond donors 1
Rotatable bonds 20
Topological polar surface area 106.54
Molecular weight 595.34
XLogP -0.47
No. Lipinski's rules broken 1
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES COCCOCCOCCOCCOCCOCCO[C@H]1CC[C@@]2([C@@]34[C@H]1Oc1c4c(C[C@H]2N(CC3)C)ccc1OC)O
Isomeric SMILES COCCOCCOCCOCCOCCOCCO[C@H]1CC[C@@]2([C@@]34[C@H]1Oc1c4c(C[C@H]2N(CC3)C)ccc1OC)O
InChI InChI=1S/C31H49NO10/c1-32-9-8-30-27-23-4-5-24(35-3)28(27)42-29(30)25(6-7-31(30,33)26(32)22-23)41-21-20-40-19-18-39-17-16-38-15-14-37-13-12-36-11-10-34-2/h4-5,25-26,29,33H,6-22H2,1-3H3/t25-,26+,29-,30-,31+/m0/s1
InChI Key RQHILGKAOIGUHU-XPLSERNMSA-N
No information available.
Summary of Clinical Use Click here for help
Development progressed to completion of Phase 3 trials in chronic pain conditions [1-2], and to submission of a New Drug Application (NDA) to the FDA. However, upon unfavourable reviews by the FDA which concluded that the drug was unlikely to be approved, Nektar withdrew the NDA and terminated the development program.
Clinical Trials
Clinical Trial ID Title Type Source Comment References
NCT02367820 Long-Term Safety and Tolerability Study of NKTR-181 in Subjects With Chronic Low Back Pain or Chronic Non-Cancer Pain Phase 3 Interventional Nektar Therapeutics