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mitucapistat   Click here for help

GtoPdb Ligand ID: 14359

Synonyms: compound 18Bd [PMID: 15921914] | compound 2 [PMID: 18789863] | SJP-0008 | SNJ-1945 | SNJ1945
PDB Ligand
Compound class: Synthetic organic
Comment: The chemical structure for this INN was obtained from WHO INN proposed list 134 (Feb 2026), where it is described as a calpain inhibitor that is proposed as a therapeutic for retinal artery occlusion. Calpain inhibitor function was described in 2005 [2], retinal penetration in 2008 [3], and neuroprotective effects were reported by Knaryan et al. in 2013 [1].
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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 Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). 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 10
Hydrogen bond donors 3
Rotatable bonds 20
Topological polar surface area 132.06
Molecular weight 491.58
XLogP 1.78
No. Lipinski's rules broken 1

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
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.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES CC(C)C[C@@H](C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)C(=O)NC2CC2)NC(=O)OCCOCCOC
Isomeric SMILES CC(C)C[C@@H](C(=O)N[C@@H](CC1=CC=CC=C1)C(=O)C(=O)NC2CC2)NC(=O)OCCOCCOC
InChI InChI=1S/C25H37N3O7/c1-17(2)15-21(28-25(32)35-14-13-34-12-11-33-3)23(30)27-20(16-18-7-5-4-6-8-18)22(29)24(31)26-19-9-10-19/h4-8,17,19-21H,9-16H2,1-3H3,(H,26,31)(H,27,30)(H,28,32)/t20-,21-/m0/s1
InChI Key PMEQLUMDXFJNRY-SFTDATJTSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
No information available.
Summary of Clinical Use Click here for help
Phase 2a results were published in early 2026, with the compound demonstrating efficacy in patients with central retinal artery occlusion [4]
Clinical Trials
Clinical Trial ID Title Type Source Comment References
NCT05320861 Single Dose ADME Study of [14C]SJP-0008 in Healthy Male Subjects Phase 1 Interventional Senju Pharmaceutical Co., Ltd.