1. GPCR/G Protein
  2. Prostaglandin Receptor
  3. Timapiprant

Timapiprant (Synonyms: OC000459)

Cat. No.: HY-15342 Purity: 95.12%
Handling Instructions

Timapiprant (OC000459) is a potent and selective D prostanoid receptor 2 (DP2) antagonist with IC50 of 13 nM.

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

Timapiprant Chemical Structure

Timapiprant Chemical Structure

CAS No. : 851723-84-7

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 73 In-stock
Estimated Time of Arrival: December 31
5 mg USD 66 In-stock
Estimated Time of Arrival: December 31
10 mg USD 113 In-stock
Estimated Time of Arrival: December 31
50 mg USD 408 In-stock
Estimated Time of Arrival: December 31
100 mg   Get quote  
200 mg   Get quote  

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Customer Review

Based on 1 publication(s) in Google Scholar

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  • Biological Activity

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Timapiprant (OC000459) is a potent and selective D prostanoid receptor 2 (DP2) antagonist with IC50 of 13 nM.

IC50 & Target

IC50 Value: 13 nM( Ki for hrCRTH2); 3 nM( Ki for Rat rCRTH2);13 nM(Ki for human native CRTH2)

In Vitro

OC000459 is an indole-acetic acid derivative that potently displaces [3H]PGD2from human recombinant DP2 (Ki = 0.013 μM), rat recombinant DP2 (Ki = 0.003 μM), and human native DP2 (Th2 cell membranes; Ki = 0.004 μM) but does not interfere with the ligand binding properties or functional activities of other prostanoid receptors (prostaglandin E1-4 receptors, D prostanoid receptor 1, thromboxane receptor, prostacyclin receptor, and prostaglandin F receptor). OC000459 inhibited chemotaxis (IC50 = 0.028 μM) of human Th2 lymphocytes and cytokine production (IC50 = 0.019 μM) by human Th2 lymphocytes. OC000459 competitively antagonized eosinophil shape change responses induced by PGD2 in both isolated human leukocytes (pKB = 7.9) and human whole blood (pKB = 7.5) but did not inhibit responses to eotaxin, 5-oxo-eicosatetraenoic acid, or complement component C5a. OC000459 also inhibited the activation of Th2 cells and eosinophils in response to supernatants from IgE/anti-IgE-activated human mast cells. OC000459 had no significant inhibitory activity on a battery of 69 receptors and 19 enzymes including cyclooxygenase 1 (COX1) and COX2[3] .

In Vivo

OC000459 was found to be orally bioavailable in rats and effective in inhibiting blood eosinophilia induced by 13,14-dihydro-15-keto-PGD2 (DK-PGD2) in this species (ED50 = 0.04 mg/kg p.o.) and airway eosinophilia in response to an aerosol of DK-PGD2 in guinea pigs (ED50 = 0.01 mg/kg p.o.) [3].

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

DMSO : 4 mg/mL (11.48 mM; Need ultrasonic)

H2O : < 0.1 mg/mL (insoluble)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.8705 mL 14.3526 mL 28.7051 mL
5 mM 0.5741 mL 2.8705 mL 5.7410 mL
10 mM 0.2871 mL 1.4353 mL 2.8705 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 0.4 mg/mL (1.15 mM); Clear solution

*All of the co-solvents are provided by MCE.
Molecular Weight









Room temperature in continental US; may vary elsewhere

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Cat. No.: HY-15342