KUS-121 free acid

DB18510InvestigationalSmall molecule

KUS-121 free acid: Overview.

Mechanism: Pharmacologically active on Transitional endoplasmic reticulum ATPase
Curator reviewed
Formula / weight: C₂₂H₁₇FN₄O₃S · 436.46 g/mol (avg)
Also known as: 1-Naphthalenesulfonic acid, 4-amino-3-[2-[6-(4-fluoro-2-methylphenyl)-3-pyridinyl]diazenyl]- · 4-Amino-3-[[6-(4-fluoro-2-methylphenyl)pyridin-3-yl]azo]naphthalene-1-sulfonic acid · KUS 121 free acid · KUS121 free acid

Resolves to

Compound

Structure

InChIKeyQOLHSSNEBRFIEQ-CYYJNZCTSA-NSMILESCC1=CC(F)=CC=C1C1=CC=C(C=N1)\N=N\C1=C(N)C2=CC=CC=C2C(=C1)S(O)(=O)=O

Targets

What you can answer from here — as of September 13, 2026

1Protein targetEach mapped to UniProt, with action and pharmacological action

Listed above

1Clinical trialPhase, status and sponsor resolved per trial

3+ReferencesStructured and connected to the statements they support

Which drugs share a target with KUS-121 free acid, and which of those have an active Phase 3 trial?

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