1. GPCR/G Protein
  2. Vasopressin Receptor
  3. Mozavaptan

Mozavaptan (Synonyms: OPC-31260; OPC31260l)

Cat. No.: HY-18346 Purity: 99.41%
Handling Instructions

Mozavaptan (OPC31260) is a orally effective, nonpeptide vasopressin V2 receptor antagonist with an IC50 of 14 nM.

For research use only. We do not sell to patients.

Mozavaptan Chemical Structure

Mozavaptan Chemical Structure

CAS No. : 137975-06-5

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Based on 1 publication(s) in Google Scholar

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Mozavaptan (OPC31260) is a orally effective, nonpeptide vasopressin V2 receptor antagonist with an IC50 of 14 nM.

IC50 & Target

IC50: 14 nM (vasopressin receptor)[1]

In Vitro

Mozavaptan causes a competitive displacement of [3H]-arginine vasopressin (AVP) binding to both V1 and V2 receptors with IC50 values of 1.2 μM and 14 nM, respectively. The Kd of [3H]-AVP is reduced significantly in both rat liver and kidney in the presence of mozavaptan (Kd=1.1 nM in liver, Kd=1.38 nM in kidney)[1].

In Vivo

Mozavaptan at doses of 10 to 100 μg/kg, i.v., inhibits the antidiuretic action of exogenously administered arginine vasopressin in water-loaded, alcohol-anaesthetized rats in a dose-dependent manner. Mozavaptan does not exert an antidiuretic activity suggesting that it is not a partial V2 receptor agonist. Mozavaptan dose-dependently increases urine flow and decreases urine osmolality after oral administration at doses of 1 to 30 mg/kg in normal conscious rats[1].

Molecular Weight









Room temperature in continental US; may vary elsewhere

Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 6.2 mg/mL (14.50 mM; Need warming)

H2O : < 0.1 mg/mL (insoluble)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.3390 mL 11.6948 mL 23.3896 mL
5 mM 0.4678 mL 2.3390 mL 4.6779 mL
10 mM 0.2339 mL 1.1695 mL 2.3390 mL
*Please refer to the solubility information to select the appropriate solvent.
Kinase Assay

To determine binding kinetic constants, liver or kidney plasma membranes are incubated with increasing concentrations of [3H]-AVP with or without excess (1 μM) unlabelled AVP to obtain a saturation curve. To investigate whether mozavaptan interacts competitively or noncompetitively, the saturation binding of [3H]-AVP is examined in the absence and presence of mozavaptan at concentrations of 0.3 μM and 1 μM in liver membranes and 3 nM, and 10 nM in kidney membranes. Data on the saturation curve are plotted according to the method of Scatchard and fitted by a regression analysis[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration

Rats: Mozavaptan is dissolved in DMSO at a concentration of 10 mM and diluted with assay buffer. Female Brattleboro rats homozygous for hypothalamic diabetes insipidus and weighing between 180 and 280g are used. Mozavaptan (30 mg/kg) and vehicle (5% gum arabic) are administered orally in a volume of 2 mL/kg and d(CH2)5Tyr(Et)VAVP (10pgkg-1) is administered in a volume of 1 mL/kg. Spontaneously voided urine is collected for 6h with metabolic cages. Both before and during the study, the rats received water and food ad libitum[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.


Purity: 99.41%

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This equation is commonly abbreviated as: C1V1 = C2V2

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C1   V1   C2   V2

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