Methoxphenidine

Methoxphenidine
Clinical data
Routes of
administration
Oral, Rectal
Legal status
Legal status
Identifiers
  • (±)-1-[1-(2-methoxyphenyl)-2-phenylethyl]piperidine
CAS Number
PubChem CID
ChemSpider
UNII
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC20H25NO
Molar mass295.426 g·mol−1
3D model (JSmol)
  • COC1=C(C=CC=C1)C(CC2=CC=CC=C2)N3CCCCC3
  • InChI=1S/C20H25NO/c1-22-20-13-7-6-12-18(20)19(21-14-8-3-9-15-21)16-17-10-4-2-5-11-17/h2,4-7,10-13,19H,3,8-9,14-16H2,1H3
  • Key:QXXCUXIRBHSITD-UHFFFAOYSA-N

Methoxphenidine (methoxydiphenidine, 2-MeO-Diphenidine, MXP) is a dissociative of the diarylethylamine class that has been sold online as a designer drug. Methoxphenidine was first reported in a 1989 patent where it was tested as a treatment for neurotoxic injury. Shortly after the 2013 UK ban on arylcyclohexylamines methoxphenidine and the related compound diphenidine became available on the gray market, where it has been encountered as a powder and in tablet form. Though diphenidine possesses higher affinity for the NMDA receptor, anecdotal reports suggest methoxphenidine has greater oral potency. Of the three isomeric anisyl-substituents methoxphenidine has affinity for the NMDA receptor that is higher than 4-MeO-diphenidine but lower than 3-MeO-diphenidine, a structure–activity relationship shared by the arylcyclohexylamines.