Florquinitau (18F)

DB19215ApprovedInvestigationalSmall molecule

Florquinitau (18F) is a fluorine-18 radioactive diagnostic tracer that binds aggregated tau and is used for brain PET imaging to identify tau neurofibrillary tangle pathology in adults with cognitive impairment being evaluated for Alzheimer's disease. It binds to aggregated tau protein, which in Alzheimer's disease forms the neurofibrillary tangles (NFTs) that are one of the two components required for a neuropathological diagnosis of the disease.

Chemical structure of Florquinitau (18F)
Mechanism
Curator reviewed
Primary indication
Florquinitau F 18 is indicated for positron emission tomography (PET) of the brain in adults with cognitive impairment who are being evaluated for Alzheimer’s disease to identify patients with tau neurofibrillary tangle (NFT) pathology.Curator reviewed · 1 structured indication
Formula / weight
C16H11FN4 · 277.293 g/mol (avg)
Also known as
5-isoquinolinamine, 6-(fluoro-18f)-3-(1h-pyrrolo(2,3-c)pyridin-1-yl)- · 6-fluoro-3-(1h-pyrrolo(2,3-c)pyridin-1-yl)isoquinolin-5-amine · Florquinitau F-18 · Florquinitau F18
Code names
(18F) MK-6240 · MK-6240 F-18

Resolves to

Structure
InChIKeyKAXAUWZJVWGFDO-SJPDSGJFSA-NSMILESNC1=C([18F])C=CC2=CN=C(C=C12)N1C=CC2=CC=NC=C12
Targets

What you can answer from here — as of September 23, 2026

1Protein targetEach mapped to UniProt, with action and pharmacological action
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1Clinical trialPhase, status and sponsor resolved per trial
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1Structured indicationCondition, population, route and combination as fields, not prose
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6+ReferencesStructured and connected to the statements they support
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