Zemprocitinib is an investigational new drug that is be evaluated by Lynk Pharmaceuticals for the treatment of ankylosing spondylitis and rheumatoid arthritis.[1] It is an janus kinase 1 (JAK1) inhibitor.[2][3]

Zemprocitinib
Clinical data
Other namesEQ-121; LNK-01001; LNK-207
Legal status
Legal status
  • investigational
Identifiers
  • N-[3-(3,5,8,10-tetrazatricyclo[7.3.0.02,6]dodeca-1,4,6,8,11-pentaen-3-yl)-1-bicyclo[1.1.1]pentanyl]propane-1-sulfonamide
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
ChEBI
ChEMBL
Chemical and physical data
FormulaC16H19N5O2S
Molar mass345.42 g·mol−1
3D model (JSmol)
  • CCCS(=O)(=O)NC12CC(C1)(C2)N3C=NC4=CN=C5C(=C43)C=CN5
  • InChI=InChI=1S/C16H19N5O2S/c1-2-5-24(22,23)20-15-7-16(8-15,9-15)21-10-19-12-6-18-14-11(13(12)21)3-4-17-14/h3-4,6,10,20H,2,5,7-9H2,1H3,(H,17,18)
  • Key:WBKCMWRKRQABQF-UHFFFAOYSA-N

Clinical trials

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It is currently being evaluated in a phase 3 trials trial for the treatment of rheumatoid rthritis.[4]

References

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  1. "Zemprocitinib - Lynk Pharmaceuticals". AdisInsight. Springer Nature Switzerland AG.
  2. Cao J, Huang R, Chen Y, Li X, Lou J, Xu L, et al. (2026). "Application of JAK inhibitors in the treatment of rheumatoid arthritis: a systematic analysis based on clinical trial databases and registries". Frontiers in Medicine. 13 1680115. Lausanne. doi:10.3389/fmed.2026.1680115. PMC 12999776. PMID 41868221.
  3. Kubyshkin V, Mykhailiuk PK (March 2026). "Smallest Bicycles in Medicinal Chemistry: Where Are We Now?". Chemical Reviews. 126 (6): 3829–3882. doi:10.1021/acs.chemrev.5c00779. PMID 41818297.
  4. Clinical trial number NCT06276998 for "A Study of LNK01001 Capsule in Subjects With Active Rheumatoid Arthritis (COURAGE-RA) " at ClinicalTrials.gov