ISM5939 | ISM5939 : Inhibitor of ENPP1
RATINGS:
Cellular Use: (0 reviews)

In Model Organisms: (1 reviews)
Control Compounds
Vendors

Probe Summary

Targets Biochemical/Biophysical Potency Cellular Potency
ENPP1
  • IC50:0.45 nM
  • IC50:9.28 nM
  • Kd:0.38 nM
  • IC50:0.63 nM
  • EC50:100 nM
Inhibitor
up to 100 nM

Selectivity

In Vitro Selectivity Assessment
Potency Assay Off-Target:
Specificity of ISM5939 for ENPP1: inhibitory effects on ENPP2 and ENPP3 were assessed enzymatically ...
In Vitro Selectivity Assessment
Potency Assay Off-Target:
Broader selectivity of ISM5939 was assessed on the ICESTP™ SafetyOne44 panel, which encompasses a co ...

Potency
Cellular
In Vitro

ENPP1

Mode of Action: Inhibitor

Structure-Activity-Relationship data available? Yes

DOI Reference: 10.1038/s41467-025-59874-0

In Vivo Validations

Mouse
Dose: 1 mg/kg IV, 5 mg/kg PO
Route of delivery: Intravenous, Oral
Systemic clearance: 14 mL/min/kg IV
Bioavailability: 32%
Volume of Distribution at Steady-State: 0.53 L/Kg

DOI Reference: 10.1038/s41467-025-59874-0

Rat
Dose: 1 mg/kg IV, 5 mg/kg PO
Route of delivery: Intravenous, Oral
Systemic clearance: 14 mL/min/kg IV
Bioavailability: 49%
Volume of Distribution at Steady-State: 1.1 L/Kg IV

DOI Reference: 10.1038/s41467-025-59874-0

Dog
Dose: 1 mg/kg IV, 5 mg/kg PO
Route of delivery: Intravenous, Oral
Systemic clearance: 2.0 mL/min/kg IV
Bioavailability: 45%
Volume of Distribution at Steady-State: 0.63 L/Kg IV

DOI Reference: 10.1038/s41467-025-59874-0

Chemical Information

Molecular Formula C20H18FN5O3S
SMILEs COc1ncc2nc(C)n(Cc3ncc(S(N)(=O)=O)cc3F)c2c1-c1ccccc1
InChI InChI=1S/C20H18FN5O3S/c1-12-25-16-10-24-20(29-2)18(13-6-4-3-5-7-13)19(16)26(12)11-17-15(21)8-14(9-23-17)30(22,27)28/h3-10H,11H2,1-2H3,(H2,22,27,28)
Molecular weight 427.11 Da
AlogP 2.6451200000000012
HBond acceptors 8
HBond donors 2
Atoms 48

References

Cross References

Expert Reviews


(on 15 May 2026)
In Model Organisms
Well described and high-quality probe on cells and in model organisms. Note pH dependent activity. Maximal cGAMP levels observed in MDA-MB-231 cell assay using 630 nM compound (IC50 of approximately 40...
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