Homocysteine

DB04422InvestigationalSmall molecule

Homocysteine is a thiol-containing amino acid formed by a demethylation of methionine.

Chemical structure of Homocysteine
Formula / weight
C4H9NO2S · 135.185 g/mol (avg)
Also known as
L-2-amino-4-mercaptobutyric acid · L-Homocysteine

Resolves to

Compound
UNII0LVT1QZ0BACAS6027-13-0ChEMBLCHEMBL469662ChEBI58199PubChem91552KEGGC00155
Structure
InChIKeyFFFHZYDWPBMWHY-VKHMYHEASA-NSMILESN[C@@H](CCS)C(O)=O
Targets
O34667luxSQ9X112metEQ9WYA5Methionine synthase

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

3Protein targetsEach mapped to UniProt, with action and pharmacological action
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2Clinical trialsPhase, status and sponsor resolved per trial
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4+ReferencesStructured and connected to the statements they support
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Which drugs share a target with Homocysteine, and which of those have an active Phase 3 trial?

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