Methiothepin Maleate

Names

[ CAS No. ]:
19728-88-2

[ Name ]:
Methiothepin Maleate

[Synonym ]:
methiothepin hydrogen maleate
N6-Cyclopentyladenosine
Metitepine maleate
metitepinmaleate
METHIOTHEPIN MALEATE

Biological Activity

[Description]:

Methiothepin maleate is a potent and non-selective 5-HT2 receptor antagonist, with pKds of 7.10 (5-HT1A), 7.28 (5HT1B), 7.56 (5HT1C), 6.99 (5HT1D), 7.0 (5-HT5A), 7.8 (5-HT5B), 8.74 (5-HT6), and 8.99 (5-HT7), and pKis of 8.50 (5HT2A), 8.68 (5HT2B), and 8.35 (5HT2C).

[Related Catalog]:

Research Areas >> Neurological Disease

Signaling Pathways >> GPCR/G Protein >> 5-HT Receptor

Signaling Pathways >> Neuronal Signaling >> 5-HT Receptor

[Target]

pKd: 7.10 (5-HT1A), 7.28 (5HT1B), 7.56 (5HT1C), 6.99 (5HT1D)[1], 7.0 (5-HT5A), 7.8 (5-HT5B), 8.74 (5-HT6), 8.99 (5-HT7)[3] pKi: 8.50 (5-HT2A), 8.68 (5-HT2B), 8.35 (5-HT2C)[2]

[In Vitro]

Methiothepin maleate is a 5-HT receptor antagonist, with pKds of 7.10, 7.28, 7.56, and 6.99 for 5-HT1A, 5HT1B, 5HT1C, 5HT1D[1]. Methiothepin mesylate also shows pKds of 7.0, 7.8, 8.74, and 8.99 for 5-HT5A, 5-HT5B, 5-HT6, and 5-HT7, respectively[2]. Methiothepin exhibits high affinity at 5-HT2A, 5HT2B, and 5HT2C with pKis of 8.50, 8.68, and 8.35, respectively[3].

[References]

[1]. Schoeffter P, et al. 5-Hydroxytryptamine (5-HT)-induced endothelium-dependent relaxation of pig coronary arteries is mediated by 5-HT receptors similar to the 5-HT1D receptor subtype. J Pharmacol Exp Ther. 1990 Jan;252(1):387-95.

[2]. Knight AR, et al. Pharmacological characterisation of the agonist radioligand binding site of 5-HT(2A), 5-HT(2B) and 5-HT(2C) receptors. Naunyn Schmiedebergs Arch Pharmacol. 2004 Aug;370(2):114-23. Epub 2004 Jul 30.

[3]. Hoyer D, et al. International Union of Pharmacology classification of receptors for 5-hydroxytryptamine (Serotonin). Pharmacol Rev. 1994 Jun;46(2):157-203.

Chemical & Physical Properties

[ Boiling Point ]:
462.9ºC at 760mmHg

[ Molecular Formula ]:
C₂₄H₂₈N₂O₄S₂

[ Molecular Weight ]:
472.62

[ Flash Point ]:
233.8ºC

[ Exact Mass ]:
472.14900

[ PSA ]:
131.68000

[ LogP ]:
3.99190

[ Vapour Pressure ]:
3.61E-08mmHg at 25°C

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TL4325000

CAS REGISTRY NUMBER :: 19728-88-2

LAST UPDATED :: 198706

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C20-H24-N2-S2.C4-H4-O4

MOLECULAR WEIGHT :: 472.66

WISWESSER LINE NOTATION :: T C676 BS&T&J FS1 I- AT6N DNTJ D1 &QV1U1VQ -C

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 125 mg/kg

TOXIC EFFECTS :: Behavioral - ataxia

REFERENCE :: CCCCAK Collection of Czechoslovak Chemical Communications. (Academic Press Inc. Ltd., 24-28 Oval Rd., London NW1 7DX, UK) V.1- 1929- Volume(issue)/page/year: 39,3338,1974

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 67600 ug/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity)

REFERENCE :: CCCCAK Collection of Czechoslovak Chemical Communications. (Academic Press Inc. Ltd., 24-28 Oval Rd., London NW1 7DX, UK) V.1- 1929- Volume(issue)/page/year: 39,3153,1974