SCH 23390 maleate
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MedKoo CAT#: 526322

CAS#: 87134-87-0 (maleate)

Description: SCH 23390 is a potent dopamine receptor antagonist (Ki values are 0.2 nM and 0.3 nM at D1 and D5 receptor sub-types, respectively). SCH 23390 is also an agonist at 5-HT1C and 5-HT2C receptors in vitro (Ki values are 6.3 nM and 9.3 nM respectively).


Chemical Structure

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SCH 23390 maleate
CAS# 87134-87-0 (maleate)

Theoretical Analysis

MedKoo Cat#: 526322
Name: SCH 23390 maleate
CAS#: 87134-87-0 (maleate)
Chemical Formula: C21H22ClNO5
Exact Mass: 0.00
Molecular Weight: 403.860
Elemental Analysis: C, 62.46; H, 5.49; Cl, 8.78; N, 3.47; O, 19.81

Price and Availability

Size Price Availability Quantity
50mg USD 650
100mg USD 1050
200mg USD 1750
500mg USD 2450
1g USD 3450
2g USD 5450
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Related CAS #: 125941-87-9 (HCl)   87075-17-0 (free base)   87134-87-0 (maleate)  

Synonym: SCH-23390; SCH23390; SCH 23390; SCH-23390 maleate;

IUPAC/Chemical Name: (R)-8-chloro-3-methyl-5-phenyl-2,3,4,5-tetrahydro-1H-benzo[d]azepin-7-ol maleate

InChi Key: FGHVSEXHEAUJBT-HFNHQGOYSA-N

InChi Code: InChI=1S/C17H18ClNO.C4H4O4/c1-19-8-7-13-9-16(18)17(20)10-14(13)15(11-19)12-5-3-2-4-6-12;5-3(6)1-2-4(7)8/h2-6,9-10,15,20H,7-8,11H2,1H3;1-2H,(H,5,6)(H,7,8)/b;2-1-/t15-;/m1./s1

SMILES Code: OC1=C(Cl)C=C2CCN(C)C[C@H](C3=CC=CC=C3)C2=C1.O=C(O)/C=C\C(O)=O

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: To be determined

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info:

Product Data:
Biological target: SCH 23390 maleate is a dopamine D1-like receptor antagonist with Kis of 0.2 nM and 0.3 nM for the D1 and D5 receptor, respectively. SCH 23390 maleate is a human 5-HT2C receptor agonist with a Ki of 9.3 nM. SCH 23390 maleate inhibits GIRK channels with an IC50 of 268 nM.
In vitro activity: In this study, SCH 23390 was discovered to inhibit GIRK channels, independent of receptor activation. The inhibition is selective, affecting GIRK currents induced by somatostatin or D3 dopamine receptors. SCH 23390 can depolarize membrane potential and induce action potentials in cells. Reference: Mol Pharmacol. 2002 Jul;62(1):119-26. https://pubmed.ncbi.nlm.nih.gov/12065762/
In vivo activity: SCH 23390 may have use in addiction treatment research. In a saccharin seeking rat model, systemic SCH 23390 injections reduced saccharin seeking and reduced saccharin seeking persistence. Reference: Appetite. 2016 Oct 1;105:8-13. https://pubmed.ncbi.nlm.nih.gov/27179937/

Preparing Stock Solutions

The following data is based on the product molecular weight 403.86 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol: 1. Kuzhikandathil EV, Oxford GS. Classic D1 dopamine receptor antagonist R-(+)-7-chloro-8-hydroxy-3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrochloride (SCH23390) directly inhibits G protein-coupled inwardly rectifying potassium channels. Mol Pharmacol. 2002 Jul;62(1):119-26. doi: 10.1124/mol.62.1.119. PMID: 12065762. 2. Millan MJ, Newman-Tancredi A, Quentric Y, Cussac D. The "selective" dopamine D1 receptor antagonist, SCH23390, is a potent and high efficacy agonist at cloned human serotonin2C receptors. Psychopharmacology (Berl). 2001 Jun;156(1):58-62. doi: 10.1007/s002130100742. PMID: 11465634. 3. Japarin RA, Harun N, Hassan Z, Müller CP. The dopamine D1 receptor antagonist SCH-23390 blocks the acquisition, but not expression of mitragynine-induced conditioned place preference in rats. Behav Brain Res. 2023 Sep 13;453:114638. doi: 10.1016/j.bbr.2023.114638. Epub 2023 Aug 22. PMID: 37619769. 4. Aoyama K, Barnes J, Koerber J, Glueck E, Dorsey K, Eaton L, Grimm JW. Systemic injection of the DAD1 antagonist SCH 23390 reduces saccharin seeking in rats. Appetite. 2016 Oct 1;105:8-13. doi: 10.1016/j.appet.2016.05.008. Epub 2016 May 11. PMID: 27179937; PMCID: PMC4980176.
In vitro protocol: 1. Kuzhikandathil EV, Oxford GS. Classic D1 dopamine receptor antagonist R-(+)-7-chloro-8-hydroxy-3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrochloride (SCH23390) directly inhibits G protein-coupled inwardly rectifying potassium channels. Mol Pharmacol. 2002 Jul;62(1):119-26. doi: 10.1124/mol.62.1.119. PMID: 12065762. 2. Millan MJ, Newman-Tancredi A, Quentric Y, Cussac D. The "selective" dopamine D1 receptor antagonist, SCH23390, is a potent and high efficacy agonist at cloned human serotonin2C receptors. Psychopharmacology (Berl). 2001 Jun;156(1):58-62. doi: 10.1007/s002130100742. PMID: 11465634.
In vivo protocol: 1. Japarin RA, Harun N, Hassan Z, Müller CP. The dopamine D1 receptor antagonist SCH-23390 blocks the acquisition, but not expression of mitragynine-induced conditioned place preference in rats. Behav Brain Res. 2023 Sep 13;453:114638. doi: 10.1016/j.bbr.2023.114638. Epub 2023 Aug 22. PMID: 37619769. 2. Aoyama K, Barnes J, Koerber J, Glueck E, Dorsey K, Eaton L, Grimm JW. Systemic injection of the DAD1 antagonist SCH 23390 reduces saccharin seeking in rats. Appetite. 2016 Oct 1;105:8-13. doi: 10.1016/j.appet.2016.05.008. Epub 2016 May 11. PMID: 27179937; PMCID: PMC4980176.

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1: Dhir A, Kulkarni SK. Involvement of dopamine (DA)/serotonin (5-HT)/sigma (sigma) receptor modulation in mediating the antidepressant action of ropinirole hydrochloride, a D2/D3 dopamine receptor agonist. Brain Res Bull. 2007 Sep 14;74(1-3):58-65. PubMed PMID: 17683790.

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7: Paalzow GH. L-dopa induces opposing effects on pain in intact rats: (-)-sulpiride, SCH 23390 or alpha-methyl-DL-p-tyrosine methylester hydrochloride reveals profound hyperalgesia in large antinociceptive doses. J Pharmacol Exp Ther. 1992 Nov;263(2):470-9. PubMed PMID: 1432683.

8: Bass AS. Presynaptic effects of dopexamine hydrochloride in the canine kidney. Naunyn Schmiedebergs Arch Pharmacol. 1992 Jan;345(1):33-6. PubMed PMID: 1347154.

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10: Vyas SJ, Apparsundaram S, Ricci A, Amenta F, Lokhandwala MF. Biochemical, autoradiographic and pharmacological evidence for the involvement of tubular DA-1 receptors in the natriuretic response to dopexamine hydrochloride. Naunyn Schmiedebergs Arch Pharmacol. 1991 Jan;343(1):21-30. PubMed PMID: 1674360.

11: Bass AS. Contrasting effects of dopexamine hydrochloride on electrolyte excretion in canine kidney. J Pharmacol Exp Ther. 1990 May;253(2):798-802. PubMed PMID: 1971021.

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