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Dihydrexidine

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Dihydrexidine
Clinical data

ATC code	none
Identifiers
IUPAC name 5,6,6a,7,8,12b-hexahydro-benzo(a)phenanthridine-10,11-diol
CAS Number	123039-93-0^Y
PubChem CID	5311070
ChemSpider	5036130^N
UNII	32D64VH037
ChEMBL	ChEMBL25856^N
CompTox Dashboard (EPA)	DTXSID00894188
Chemical and physical data
Formula	C₁₇H₁₇NO₂
Molar mass	267.328 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES c1ccc2c(c1)CN[C@H]3[C@H]2c4cc(c(cc4CC3)O)O
InChI InChI=1S/C17H17NO2/c19-15-7-10-5-6-14-17(13(10)8-16(15)20)12-4-2-1-3-11(12)9-18-14/h1-4,7-8,14,17-20H,5-6,9H2/t14-,17-/m1/s1^N Key:BGOQGUHWXBGXJW-RHSMWYFYSA-N^N
^NY (what is this?) (verify)

Dihydrexidine (DAR-0100) is a moderately selective full agonist at the dopamine D₁ and D₅ receptors.^[1] It has approximately 10-fold selectivity for D₁ and D₅ over the D₂ receptor.^[2] Although dihydrexidine has some affinity for the D₂ receptor, it has functionally selective (highly biased) D₂ signaling,^[3] thereby explaining why it lacks D₂ agonist behavioral qualities.^[4]

Dihydrexidine has shown impressive antiparkinson effects in the MPTP-primate model,^[5] and has been investigated for the treatmentofParkinson's disease.^[6] In an early clinical trial the drug was given intravenously and led to profound hypotensionsodevelopment was halted.^[7] The drug was resurrected when it was shown that smaller subcutaneous doses were safe.^[8] This led to a pilot study in schizophrenia^[9] and current clinical trials to assess its efficacy in improving the cognitive and working memory deficitsinschizophrenia and schizotypal disorder.

There have been several reviews of relevance to the compound.^[10]^[11]^[12]

References[edit]

^ Lovenberg TW, Brewster WK, Mottola DM, Lee RC, Riggs RM, Nichols DE, Lewis MH, Mailman RB (1989). "Dihydrexidine, a novel selective high potency full dopamine D-1 receptor agonist". Eur J Pharmacol. 166 (1): 111–113. doi:10.1016/0014-2999(89)90690-0. PMID 2572425.

^ Mottola DM, Brewster WK, Cook LL, Nichols DE, Mailman RB (1992). "Dihydrexidine, a novel full efficacy D1 dopamine receptor agonist". J Pharmacol Exp Ther. 262 (1): 383–393. PMID 1352553.

^ Kilts, JD.; et al. (2002). "Functional selectivity of dopamine receptor agonists. II. Actions of dihydrexidine in D2L receptor-transfected MN9D cells and pituitary lactotrophs". J Pharmacol Exp Ther. 301 (3): 1179–89. doi:10.1124/jpet.301.3.1179. PMID 12023553.

^ Darney KJ Jr, Lewis MH, Brewster WK, Nichols DE, Mailman RB (1991). "Behavioral effects in the rat of dihydrexidine, a high-potency, full-efficacy D1 dopamine receptor agonist". Neuropsychopharmacology. 5 (3): 187–195. PMID 1684499.

^ Taylor JR, Lawrence MS, Redmond DE Jr, Elsworth JD, Roth RH, Nichols DE, Mailman RB (1991). "Dihydrexidine, a full dopamine D1 agonist, reduces MPTP-induced parkinsonism in monkeys". Eur J Pharmacol. 199 (3): 389–391. doi:10.1016/0014-2999(91)90508-N. PMID 1680717.

^ Mailman RB, Nichols DE (1998). "Dopamine D1 receptor agonists as antiparkinson drugs". Trends Pharmacol. Sci. 19 (7): 255–256. doi:10.1016/S0165-6147(98)01219-X. PMID 9703756.

^ Blanchet PJ, Fang J, Gillespie M, Sabounjian L, Locke KW, Gammans R, Mouradian MM, Chase TN (1998). "Effects of the full dopamine D1 receptor agonist dihydrexidine in Parkinson's disease". Clin. Neuropharmacol. 21 (6): 339–343. PMID 9844789.

^ George MS, Molnar CE, Grenesko EL, Anderson B, Mu Q, Johnson K, Nahas Z, Knable M, Fernandes P, Juncos J, Huang X, Nichols DE, Mailman RB (2007). "A single 20 mg dose of dihydrexidine (DAR-0100), a full dopamine D1 agonist, is safe and tolerated in patients with schizophrenia". Schizophr. Res. 93 (1–3): 42–50. doi:10.1016/j.schres.2007.03.011. PMID 17467956. S2CID 31375175.

^ Mu Q, Johnson K, Morgan PS, Grenesko EL, Molnar CE, Anderson B, Nahas Z, Kozel FA, Kose S, Knable M, Fernandes P, Nichols DE, Mailman RB, George MS (2007). "A single 20 mg dose of the full D1 dopamine agonist dihydrexidine (DAR-0100) increases prefrontal perfusion in schizophrenia". Schizophr. Res. 94 (1–3): 332–341. doi:10.1016/j.schres.2007.03.033. PMID 17596915. S2CID 25497605.

^ Mailman R, Huang X, Nichols DE (2001). "Parkinson's disease and D1 dopamine receptors". Current Opinion in Investigational Drugs. 2 (11): 1582–1591. PMID 11763161.

^ Salmi P, Isacson R, Kull B (2004). "Dihydrexidine--the first full dopamine D1 receptor agonist". CNS Drug Rev. 10 (3): 230–242. doi:10.1111/j.1527-3458.2004.tb00024.x. PMC 6741759. PMID 15492773.

^ Zhang J, Xiong B, Zhen X, Zhang A (2009). "Dopamine D1 receptor ligands: where are we now and where are we going". Med Res Rev. 29 (2): 272–294. doi:10.1002/med.20130. PMID 18642350. S2CID 25334596.

v t e Stimulants
Adamantanes	Adapromine Amantadine Bromantane Memantine Rimantadine
Adenosine antagonists	8-Chlorotheophylline 8-Cyclopentyltheophylline 8-Phenyltheophylline Aminophylline Caffeine CGS-15943 Dimethazan Istradefylline Paraxanthine SCH-58261 Theobromine Theophylline
Alkylamines	Cyclopentamine Cypenamine Cyprodenate Heptaminol Isometheptene Levopropylhexedrine Methylhexaneamine Octodrine Propylhexedrine Tuaminoheptane
Ampakines	CX-516 CX-546 CX-614 CX-691 CX-717 IDRA-21 LY-404,187 LY-503,430 Nooglutyl Org 26576 PEPA S-18986 Sunifiram Unifiram
Arylcyclohexylamines	Benocyclidine Dieticyclidine Esketamine Eticyclidine Gacyclidine Ketamine Phencyclamine Phencyclidine Rolicyclidine Tenocyclidine Tiletamine
Benzazepines	6-Br-APB SKF-77434 SKF-81297 SKF-82958
Cathinones	3-Fluoromethcathinone 3,4-DMMC 4-BMC 4-CMC 4-Methylbuphedrone 4-Methylcathinone 4-MEAP 4-Methylpentedrone Amfepramone Benzedrone Buphedrone Bupropion Butylone Cathinone Dimethylcathinone Ethcathinone Ethylone Flephedrone Hexedrone Isoethcathinone Mephedrone Methcathinone Methedrone Methylenedioxycathinone Methylone Mexedrone N-Ethylbuphedrone N-Ethylhexedrone Pentedrone Pentylone Phthalimidopropiophenone
Cholinergics	A-84,543 A-366,833 ABT-202 ABT-418 AR-R17779 Altinicline Anabasine Arecoline Bradanicline Cotinine Cytisine Dianicline Epibatidine Epiboxidine GTS-21 Ispronicline Nicotine PHA-543,613 PNU-120,596 PNU-282,987 Pozanicline Rivanicline Sazetidine A SIB-1553A SSR-180,711 TC-1698 TC-1827 TC-2216 Tebanicline UB-165 Varenicline WAY-317,538
Convulsants	Anatoxin-a Bicuculline DMCM Flurothyl Gabazine Pentetrazol Picrotoxin Strychnine Thujone
Eugeroics	Adrafinil Armodafinil CRL-40,940 CRL-40,941 Fluorenol Modafinil
Oxazolines	4-Methylaminorex Aminorex Clominorex Cyclazodone Fenozolone Fluminorex Pemoline Thozalinone
Phenethylamines	1-(4-Methylphenyl)-2-aminobutane 1-Methylamino-1-(3,4-methylenedioxyphenyl)propane 2-Fluoroamphetamine 2-Fluoromethamphetamine 2-OH-PEA 2-Phenyl-3-aminobutane 2,3-MDA 3-Fluoroamphetamine 3-Fluoroethamphetamine 3-Methoxyamphetamine 3-Methylamphetamine 4-Fluoroamphetamine 4-Fluoromethamphetamine 4-MA 4-MMA 4-MTA 6-FNE AL-1095 Alfetamine a-Ethylphenethylamine Amfecloral Amfepentorex Amidephrine 2-Amino-1,2-dihydronaphthalene 2-Aminoindane 5-(2-Aminopropyl)indole 2-Aminotetralin Acridorex Amphetamine (Dextroamphetamine, Levoamphetamine) Amphetaminil Arbutamine β-Methylphenethylamine β-Phenylmethamphetamine Benfluorex Benzphetamine BDB BOH 3-Benzhydrylmorpholine BPAP Camfetamine Cathine Chlorphentermine Cilobamine Cinnamedrine Clenbuterol Clobenzorex Cloforex Clortermine Cypenamine D-Deprenyl Denopamine Dimethoxyamphetamine Dimethylamphetamine Dobutamine DOPA (Dextrodopa, Levodopa) Dopamine Dopexamine Droxidopa EBDB Ephedrine Epinephrine Epinine Etafedrine Ethylnorepinephrine Etilamfetamine Etilefrine Famprofazone Fencamfamin Fencamine Fenethylline Fenfluramine (Dexfenfluramine, Levofenfluramine) Fenproporex Feprosidnine Fludorex Formetorex Furfenorex Gepefrine Hexapradol HMMA Hordenine 4-Hydroxyamphetamine 5-Iodo-2-aminoindane Ibopamine Indanylamphetamine Iofetamine Isoetarine Isoprenaline L-Deprenyl (Selegiline) Lefetamine Lisdexamfetamine Lophophine MBDB MDA (tenamfetamine) MDBU MDEA MDMA (midomafetamine) MDMPEA MDOH MDPR MDPEA Mefenorex Mephentermine Metanephrine Metaraminol Mesocarb Methamphetamine (Dextromethamphetamine, Levomethamphetamine) Methoxamine Methoxyphenamine MMA Methoxyphenamine MMDA MMDMA MMMA Morforex N,alpha-Diethylphenylethylamine N,N-Dimethylphenethylamine Naphthylamphetamine Nisoxetine Norepinephrine Norfenefrine Norfenfluramine Normetanephrine L-Norpseudoephedrine Octopamine Orciprenaline Ortetamine Oxifentorex Oxilofrine PBA PCA PCMA PHA Pentorex Phenatine Phenpromethamine Phentermine Phenylalanine Phenylephrine Phenylpropanolamine Pholedrine PIA PMA PMEA PMMA PPAP Prenylamine Propylamphetamine Pseudoephedrine Ropinirole Salbutamol (Levosalbutamol) Sibutramine Solriamfetol Synephrine Theodrenaline Tiflorex Tranylcypromine Tyramine Tyrosine Xylopropamine Zylofuramine
Phenylmorpholines	3-Fluorophenmetrazine Fenbutrazate Fenmetramide G-130 Manifaxine Morazone Morforex Oxaflozane PD-128,907 Phendimetrazine Phenmetrazine 2-Phenyl-3,6-dimethylmorpholine Pseudophenmetrazine Radafaxine
Piperazines	2C-B-BZP 3C-PEP BZP CM156 DBL-583 GBR-12783 GBR-12935 GBR-13069 GBR-13098 GBR-13119 MeOPP MBZP oMPP Vanoxerine
Piperidines	1-Benzyl-4-(2-(diphenylmethoxy)ethyl)piperidine 2-Benzylpiperidine 2-Methyl-3-phenylpiperidine 3,4-Dichloromethylphenidate 4-Benzylpiperidine 4-Fluoromethylphenidate 4-Methylmethylphenidate Desoxypipradrol Difemetorex Diphenylpyraline Ethylnaphthidate Ethylphenidate Methylnaphthidate Isopropylphenidate JZ-IV-10 Methylphenidate (Dexmethylphenidate) Nocaine Phacetoperane Pipradrol Propylphenidate Serdexmethylphenidate SCH-5472
Pyrrolidines	2-Diphenylmethylpyrrolidine 4-Cl-PVP 5-DBFPV α-PPP α-PBP α-PCYP α-PHiP α-PHP α-PHPP α-PVP α-PVT Diphenylprolinol DMPVP FPOP FPVP MDPPP MDPBP MPBP MPHP MPPP MOPVP MOPPP Indapyrophenidone MDPV Naphyrone PEP Picilorex Prolintane Pyrovalerone
Racetams	Oxiracetam Phenylpiracetam Phenylpiracetam hydrazide
Tropanes	4-fluorotropacocaine 4'-Fluorococaine Altropane (IACFT) Brasofensine CFT (WIN 35,428) β-CIT (RTI-55) Cocaethylene Cocaine Dichloropane (RTI-111) Difluoropine FE-β-CPPIT FP-β-CPPIT Ioflupane (¹²³I) Norcocaine PIT PTT RTI-31 RTI-32 RTI-51 RTI-112 RTI-113 RTI-120 RTI-121 (IPCIT) RTI-126 RTI-150 RTI-177 RTI-229 RTI-336 RTI-354 RTI-371 RTI-386 Salicylmethylecgonine Tesofensine Troparil (β-CPT, WIN 35,065-2) Tropoxane WF-23 WF-33
Tryptamines	4-HO-αMT 4-Methyl-αET 4-Methyl-αMT 5-Chloro-αMT 5-Fluoro-αMT 5-MeO-αET 5-MeO-αMT 5-MeO-DIPT 6-Fluoro-αMT 7-Methyl-αET αET αMT
Others	2-MDP 3,3-Diphenylcyclobutanamine Amfonelic acid Amineptine Amiphenazole Atipamezole Atomoxetine Bemegride Benzydamine BTQ BTS 74,398 Centanafadine Ciclazindol Clofenciclan Cropropamide Crotetamide D-161 Desipramine Diclofensine Dimethocaine Efaroxan Etamivan Fenisorex Fenpentadiol Gamfexine Gilutensin GSK1360707F GYKI-52895 Hexacyclonate Idazoxan Indanorex Indatraline JNJ-7925476 Lazabemide Leptacline Lomevactone LR-5182 Mazindol Meclofenoxate Medifoxamine Mefexamide Methamnetamine Methastyridone Methiopropamine Naphthylaminopropane Nefopam Nikethamide Nomifensine O-2172 Oxaprotiline PNU-99,194 PRC200-SS Rasagiline Rauwolscine Rubidium chloride Setazindol Tametraline Tandamine Thiopropamine Thiothinone Trazium UH-232 Yohimbine
ATC code: N06B

Sympatholytic (and closely related) antihypertensives (C02)

Sympatholytics
(antagonize α-adrenergic
vasoconstriction)

Central

α₂-Adrenergic receptor agonists	Clonidine Guanabenz Guanfacine Guanoxabenz Methyldopa^# Tiamenidine^‡
Adrenergic release inhibitors	Bethanidine Bretylium Debrisoquine Guanadrel Guanazodine Guancydine Guanethidine Guanoclor Guanoxan
Imidazoline receptor agonists	Moxonidine Rilmenidine Tolonidine
Ganglion-blocking/nicotinic antagonists	Hexamethonium^‡ Mecamylamine Pentolinium Trimethaphan