# Fourphit

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Pharmaceutical compound

Fourphit Clinical data Other names 4-Isothiocyanato-PCP Drug class Irreversible dopamine transporter blocker; Reversible NMDA receptor antagonist; Psychostimulant antagonist Identifiers IUPAC name 4-isothiocyanato-1-(1-phenylcyclohexyl)piperidine CAS Number 104639-01-2 Y PubChem CID 128615 ChemSpider 113988 UNII EP455HL5XL CompTox Dashboard (EPA) DTXSID10146625 Chemical and physical data Formula C18H24N2S Molar mass 300.46 g·mol−1 3D model (JSmol) Interactive image SMILES C1CCC(CC1)(C2=CC=CC=C2)N3CCC(CC3)N=C=S InChI InChI=1S/C18H24N2S/c21-15-19-17-9-13-20(14-10-17)18(11-5-2-6-12-18)16-7-3-1-4-8-16/h1,3-4,7-8,17H,2,5-6,9-14H2 Key:QAHYIAVTWZVTMY-UHFFFAOYSA-N

**Fourphit**, also known as **4-isothiocyanato-PCP**, is an [irreversible](/source/Irreversible_inhibitor) [dopamine transporter](/source/Dopamine_transporter) (DAT) [blocker](/source/Dopamine_reuptake_inhibitor) and a reversible [NMDA receptor antagonist](/source/NMDA_receptor_antagonist).[1][2] It blocks the binding of [methylphenidate](/source/Methylphenidate) to the DAT *[in vitro](/source/In_vitro)*,[1] though apparently not *[in vivo](/source/In_vivo)*.[2] In any case, the drug reduces the [stimulant](/source/Stimulant)-like effects of [cocaine](/source/Cocaine) in animals,[2] whilst producing mostly negligible behavioral effects itself.[2] Fourphit is an [acylating](/source/Acylation) [derivative](/source/Chemical_derivative) of [phencyclidine](/source/Phencyclidine) (PCP) and a [positional isomer](/source/Positional_isomer) of [metaphit](/source/Metaphit) (3-isothiocyanato-PCP).[1]

## See also

- [RTI-76](/source/List_of_phenyltropanes#Irreversible_covalent_(cf._ionic)_C2_ligands)

- [*p*-ISOCOC](/source/P-ISOCOC)

- [Methocinnamox](/source/Methocinnamox)

## References

1. ^ [***a***](#cite_ref-SchweriThurkaufMattson1992_1-0) [***b***](#cite_ref-SchweriThurkaufMattson1992_1-1) [***c***](#cite_ref-SchweriThurkaufMattson1992_1-2) Schweri MM, Thurkauf A, Mattson MV, Rice KC (June 1992). "Fourphit: a selective probe for the methylphenidate binding site on the dopamine transporter". *J Pharmacol Exp Ther*. **261** (3): 936–942. [doi](/source/Doi_(identifier)):[10.1016/S0022-3565(25)11167-1](https://doi.org/10.1016%2FS0022-3565%2825%2911167-1). [PMID](/source/PMID_(identifier)) [1602399](https://pubmed.ncbi.nlm.nih.gov/1602399).

1. ^ [***a***](#cite_ref-SchwerideCostaRice1998_2-0) [***b***](#cite_ref-SchwerideCostaRice1998_2-1) [***c***](#cite_ref-SchwerideCostaRice1998_2-2) [***d***](#cite_ref-SchwerideCostaRice1998_2-3) Schweri MM, de Costa BR, Rice KC (July 1998). "Fourphit, an acylating phencyclidine derivative, attenuates cocaine-induced hyperactivity in rats". *Pharmacol Biochem Behav*. **60** (3): 615–623. [doi](/source/Doi_(identifier)):[10.1016/s0091-3057(98)00040-9](https://doi.org/10.1016%2Fs0091-3057%2898%2900040-9). [PMID](/source/PMID_(identifier)) [9678644](https://pubmed.ncbi.nlm.nih.gov/9678644).

v t e Monoamine reuptake inhibitors DATTooltip Dopamine transporter (DRIsTooltip Dopamine reuptake inhibitors) Piperazines: DBL-583 GBR-12783 GBR-12935 GBR-13069 GBR-13098 JJC8-088 Nefazodone Vanoxerine Piperidines: 4-Fluoropethidine Benocyclidine (BTCP) Desoxypipradrol Dexmethylphenidate Difemetorex Ethylphenidate HDMP-28 Methylphenidate Pethidine (meperidine) Phencyclidine Pipradrol Serdexmethylphenidate Tenocyclidine Pyrrolidines: Diphenylprolinol MDPV Naphyrone Prolintane Pyrovalerone Tropanes: Altropane Benzatropine (benztropine) Brasofensine CFT Cocaine Dichloropane Difluoropine Etybenzatropine (ethybenztropine) FE-β-CPPIT FP-β-CPPIT Ioflupane (123I) RTI-55 RTI-112 RTI-113 RTI-121 RTI-126 RTI-150 RTI-177 RTI-229 RTI-336 Tesofensine Troparil Tropoxane WF-11 WF-23 WF-31 WF-33 Others: 1-Ethyl-β-carboline Adrafinil Amifitadine Armodafinil Amfonelic acid Amineptine Ansofaxine BTQ BTS 74,398 Bupropion Chaenomeles speciosa Ciclazindol Dasotraline Desmethylsertraline Desmethylsibutramine (BTS-54354) Diclofensine Didesmethylsibutramine (BTS-54505) Dimethocaine Diphenylpyraline Dizocilpine (MK-801) DOV-102,677 DOV-216,303 Efavirenz Ephenidine Esketamine EXP-561 Fencamfamin Fezolamine Fluorenol GYKI-52895 Hydroxybupropion Indatraline Ketamine Lafadofensine Lefetamine Levophacetoperane Liafensine LR-5182 Manifaxine Mazindol Medifoxamine Mesocarb Metaphit MIN-117 (WF-516) Modafinil Nefopam Nomifensine NS-2359 O-2172 Oroxylin A Perafensine Pridefine Pudafensine Radafaxine Rimcazole Sertraline Sibutramine Solriamfetol Tametraline Tedatioxetine Threohydrobupropion Tripelennamine Venlafaxine NETTooltip Norepinephrine transporter (NRIsTooltip Norepinephrine reuptake inhibitors) Selective norepinephrine reuptake inhibitors: Amedalin Alseroxylon Ciclazindol Daledalin Edivoxetine Esreboxetine Lortalamine Mazindol Nisoxetine Reboxetine Talopram Talsupram Tandamine Teniloxazine Viloxazine Norepinephrine–dopamine reuptake inhibitors: Amineptine Bupropion Fencamine Fencamfamin Hydroxybupropion Lefetamine Levophacetoperane LR-5182 Manifaxine Methylphenidate Nomifensine O-2172 Radafaxine Serdexmethylphenidate Solriamfetol Serotonin–norepinephrine reuptake inhibitors: Atomoxetine (tomoxetine) CP-39,332 Desvenlafaxine Duloxetine Eclanamine Levomilnacipran McN5652 Milnacipran N-Methyl-PPPA Nafenodone PPPA Tofenacin Venlafaxine Serotonin–norepinephrine–dopamine reuptake inhibitors: 3,3-Diphenylcyclobutanamine Amifitadine Ansofaxine Bicifadine Brasofensine Centanafadine Cocaine Dasotraline Desmethylsertraline Desmethylsibutramine (BTS-54354) Diclofensine Didesmethylsibutramine (BTS-54505) DOV-102677 DOV-216303 EXP-561 Fezolamine HDMP-28 HP-505 Indatraline JNJ-7925476 JZ-IV-10 Lafadofensine Liafensine Mazindol Naphyrone Nefazodone Nefopam NS-2359 Perafensine PRC200 Pridefine Pudafensine SEP-228431 SEP-228432 Sibutramine Tedatioxetine Tesofensine Threohydrobupropion Tropanes (e.g., cocaine) Tricyclic antidepressants: Amitriptyline Butriptyline Cianopramine Clomipramine Desipramine Dosulepin (dothiepin) Doxepin Imipramine Lofepramine Melitracen Nortriptyline Protriptyline Trimipramine Tetracyclic antidepressants: Amoxapine Maprotiline Mianserin Oxaprotiline Setiptiline Others: Amezinium metilsulfate Antihistamines (e.g., brompheniramine, chlorphenamine, pheniramine, tripelennamine) Antipsychotics (e.g., loxapine, ziprasidone) Arylcyclohexylamines (e.g., ketamine, phencyclidine) Dopexamine Ephenidine Ginkgo biloba Indeloxazine Nefazodone Opioids (e.g., desmetramadol, methadone, pethidine (meperidine), tapentadol, tramadol, levorphanol) SERTTooltip Serotonin transporter (SRIsTooltip Serotonin reuptake inhibitors) Selective serotonin reuptake inhibitors: 6-Nitroquipazine Alaproclate Centpropazine Cericlamine Citalopram Dapoxetine Desmethylcitalopram Didesmethylcitalopram Escitalopram Femoxetine Fluoxetine Fluvoxamine Indalpine Ifoxetine MADAM Norfluoxetine Omiloxetine Panuramine Paroxetine PIM-35 Pirandamine RTI-353 Seproxetine Sertraline Zimelidine Selective serotonin reuptake inhibitors and serotonin receptor modulators: DSP-6745 Etoperidone Litoxetine Lubazodone LY-393558 Quipazine SB-649915 TGBA01AD Trazodone Vilazodone Vortioxetine Serotonin–norepinephrine reuptake inhibitors: Atomoxetine (tomoxetine) Bicifadine CP-39332 Desvenlafaxine Duloxetine Eclanamine Levomilnacipran McN5652 Milnacipran N-Methyl-PPPA PPPA Tofenacin Venlafaxine Serotonin–norepinephrine–dopamine reuptake inhibitors: 3,3-Diphenylcyclobutanamine Amifitadine Ansofaxine Bicifadine Brasofensine Centanafadine Cocaine Dasotraline Desmethylsertraline Desmethylsibutramine (BTS-54354) Diclofensine Didesmethylsibutramine (BTS-54505) DOV-102677 DOV-216303 EXP-561 Fezolamine HDMP-28 HP-505 Indatraline JNJ-7925476 JZ-IV-10 Lafadofensine Liafensine Mazindol Naphyrone Nefazodone Nefopam NS-2359 Perafensine PRC200 Pridefine Pudafensine SEP-228431 SEP-228432 Sibutramine Tedatioxetine Tesofensine Threohydrobupropion Tropanes (e.g., cocaine) Tricyclic antidepressants: Amitriptyline Cianopramine Clomipramine Cyanodothiepin Desipramine Dosulepin (dothiepin) Doxepin Imipramine Lofepramine Nortriptyline Pipofezine Protriptyline Others: A-80426 Amoxapine Antihistamines (e.g., brompheniramine, chlorphenamine, dimenhydrinate, diphenhydramine, mepyramine (pyrilamine), pheniramine, tripelennamine) Antipsychotics (e.g., loxapine, ziprasidone) Arylcyclohexylamines (e.g., 3-MeO-PCP, esketamine, ketamine, methoxetamine, phencyclidine) Cyclobenzaprine Delucemine Dextromethorphan Dextrorphan Efavirenz Hypidone Medifoxamine Mesembrine Mifepristone MIN-117 (WF-516) N-Me-5-HT Opioids (e.g., dextropropoxyphene, methadone, pethidine (meperidine), levorphanol, tapentadol, tramadol) Roxindole VMATsTooltip Vesicular monoamine transporters Amiodarone Amphetamines (e.g., amphetamine, methamphetamine, MDMA) APP AZIK Bietaserpine Deserpidine Deutetrabenazine Dihydrotetrabenazine Efavirenz GBR-12935 GZ-793A Ibogaine Ketanserin Lobeline Methoxytetrabenazine Reserpine Rose bengal Tetrabenazine Valbenazine Vanoxerine (GBR-12909) Others Unsorted: Cendifensine DAT enhancers: Luteolin DAT modulators: Agonist-like: SoRI-9804 SoRI-20040; Antagonist-like: SoRI-20041 See also: Receptor/signaling modulators • Monoamine releasing agents • Adrenergics • Dopaminergics • Serotonergics • Monoamine metabolism modulators • Monoamine neurotoxins

v t e Ionotropic glutamate receptor modulators AMPARTooltip α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor Agonists: Main site agonists: 5-Fluorowillardiine Acromelic acid (acromelate) AMPA BOAA Domoic acid Glutamate Ibotenic acid Proline Quisqualic acid Willardiine; Positive allosteric modulators: Aniracetam Cyclothiazide CX-516 CX-546 CX-614 Farampator (CX-691, ORG-24448) CX-717 CX-1739 CX-1942 Diazoxide Hydrochlorothiazide (HCTZ) IDRA-21 LY-392098 LY-395153 LY-404187 LY-451646 LY-503430 Mibampator (LY-451395) Nooglutyl ORG-26576 Oxiracetam PEPA Pesampator (BIIB-104, PF-04958242) Piracetam Pramiracetam S-18986 Tulrampator (S-47445, CX-1632) Antagonists: ACEA-1011 ATPO Becampanel Caroverine CNQX Dasolampanel DNQX Fanapanel (MPQX) GAMS Kaitocephalin Kynurenic acid Kynurenine Licostinel (ACEA-1021) NBQX PNQX Selurampanel Tezampanel Theanine Topiramate YM90K Zonampanel; Negative allosteric modulators: Barbiturates (e.g., pentobarbital, sodium thiopental) Cyclopropane Enflurane Ethanol (alcohol) Evans blue GYKI-52466 GYKI-53655 Halothane Irampanel Isoflurane Perampanel Pregnenolone sulfate RAP-219 Sevoflurane Talampanel; Unknown/unsorted antagonists: Minocycline KARTooltip Kainate receptor Agonists: Main site agonists: 5-Bromowillardiine 5-Iodowillardiine Acromelic acid (acromelate) AMPA ATPA Domoic acid Glutamate Ibotenic acid Kainic acid LY-339434 Proline Quisqualic acid SYM-2081; Positive allosteric modulators: Cyclothiazide Diazoxide Enflurane Halothane Isoflurane Antagonists: ACEA-1011 CNQX Dasolampanel DNQX GAMS Kaitocephalin Kynurenic acid Licostinel (ACEA-1021) LY-382884 NBQX NS102 Selurampanel Tezampanel Theanine Topiramate UBP-302; Negative allosteric modulators: Barbiturates (e.g., pentobarbital, sodium thiopental) Enflurane Ethanol (alcohol) Evans blue NS-3763 Pregnenolone sulfate NMDARTooltip N-Methyl-D-aspartate receptor Agonists: Main site agonists: AMAA Aspartate Glutamate Homocysteic acid (L-HCA) Homoquinolinic acid Ibotenic acid NMDA Proline Quinolinic acid Tetrazolylglycine Theanine; Glycine site agonists: β-Fluoro-D-alanine ACBD ACC (ACPC) ACPD AK-51 Apimostinel (NRX-1074) B6B21 CCG D-Alanine D-Cycloserine D-Serine DHPG Dimethylglycine Glycine HA-966 L-687,414 L-Alanine L-Serine Milacemide Neboglamine (nebostinel) Rapastinel (GLYX-13) Sarcosine; Polyamine site agonists: Neomycin Spermidine Spermine; Other positive allosteric modulators: 24S-Hydroxycholesterol DHEATooltip Dehydroepiandrosterone (prasterone) DHEA sulfate (prasterone sulfate) Epipregnanolone sulfate Plazinemdor Pregnenolone sulfate SAGE-201 SAGE-301 SAGE-718 Antagonists: Competitive antagonists: AP5 (APV) AP7 CGP-37849 CGP-39551 CGP-39653 CGP-40116 CGS-19755 CPP Kaitocephalin LY-233053 LY-235959 LY-274614 MDL-100453 Midafotel (d-CPPene) NPC-12626 NPC-17742 PBPD PEAQX Perzinfotel PPDA SDZ-220581 Selfotel; Glycine site antagonists: 4-Cl-KYN (AV-101) 5,7-DCKA 7-CKA ACC ACEA-1011 ACEA-1328 Apimostinel (NRX-1074) AV-101 Carisoprodol CGP-39653 CNQX D-Cycloserine DNQX Felbamate Gavestinel GV-196771 Harkoseride Kynurenic acid Kynurenine L-689560 L-701324 Licostinel (ACEA-1021) LU-73068 MDL-105519 Meprobamate MRZ 2/576 PNQX Rapastinel (GLYX-13) ZD-9379; Polyamine site antagonists: Arcaine Co 101676 Diaminopropane Diethylenetriamine Huperzine A Putrescine; Uncompetitive pore blockers (mostly dizocilpine site): 2-MDP 3-HO-PCP 3-MeO-PCE 3-MeO-PCMo 3-MeO-PCP 4-MeO-PCP 8A-PDHQ 18-MC α-Endopsychosin Alaproclate Alazocine (SKF-10047) Amantadine Aptiganel Argiotoxin-636 Arketamine ARL-12495 ARL-15896-AR ARL-16247 Budipine CNS-5161 Coronaridine Delucemine (NPS-1506) Dexoxadrol Dextrallorphan Dextromethadone Dextromethorphan Dextrorphan Dieticyclidine Diphenidine Dizocilpine Ephenidine Esketamine Etoxadrol Eticyclidine F-17475 Fluorolintane Gacyclidine Ibogaine Ibogamine Indantadol Ketamine Ketobemidone Lanicemine Levomethadone Levomethorphan Levomilnacipran Levorphanol Loperamide Memantine Methadone Methorphan Methoxetamine Methoxphenidine Milnacipran Morphanol NEFA Neramexane Nitromemantine Noribogaine Norketamine Orphenadrine PCPr PD-137889 Pethidine (meperidine) Phencyclamine Phencyclidine Propoxyphene Remacemide Rhynchophylline Rimantadine Rolicyclidine Sabeluzole Tabernanthine Tenocyclidine Tiletamine Tramadol; Ifenprodil (NR2B) site antagonists: Besonprodil Buphenine (nylidrin) CO-101244 (PD-174494) Eliprodil Haloperidol Isoxsuprine Radiprodil (RGH-896) Rislenemdaz (CERC-301, MK-0657) Ro 8-4304 Ro 25-6981 Safaprodil Traxoprodil (CP-101606); NR2A-selective antagonists: MPX-004 MPX-007 TCN-201 TCN-213; Cations: Hydrogen Magnesium Zinc; Alcohols/volatile anesthetics/related: Benzene Butane Chloroform Cyclopropane Desflurane Diethyl ether Enflurane Ethanol (alcohol) Halothane Hexanol Isoflurane Methoxyflurane Nitrous oxide Octanol Sevoflurane Toluene Trichloroethane Trichloroethanol Trichloroethylene Urethane Xenon Xylene; Unknown/unsorted antagonists: ARR-15896 BQ-869 Bumetanide Caroverine Conantokin D-αAA Dexanabinol Flufenamic acid Flupirtine FPL-12495 FR-115427 Furosemide Hodgkinsine Ipenoxazone (MLV-6976) MDL-27266 Metaphit Minocycline MPEP Niflumic acid Pentamidine Pentamidine isethionate Piretanide Psychotridine Transcrocetin (saffron) Unsorted: Allosteric modulators: AGN-241751 See also: Receptor/signaling modulators Metabotropic glutamate receptor modulators Glutamate metabolism/transport modulators

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Adapted from the Wikipedia article [Fourphit](https://en.wikipedia.org/wiki/Fourphit) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Fourphit?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.