WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 326803

CAS#: 124436-59-5

Description: Pirodavir, also known as R 77975, is a capsid-binding antipicornavirus agent with potent in vitro activity against both group A and group B rhinovirus serotypes. Pirodavir was one of the most promising capsid-binding compounds to show efficacy in human clinical trials for chemoprophylaxis of the common cold.

Price and Availability

Size Price Shipping out time Quantity
50mg USD 450 2 Weeks
100mg USD 850 2 Weeks
200mg USD 1250 2 Weeks
500mg USD 1650 2 Weeks
1g USD 2650 2 Weeks
2g USD 4750 2 Weeks
5g USD 6850 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-18. Prices are subject to change without notice.

Pirodavir, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 326803
Name: Pirodavir
CAS#: 124436-59-5
Chemical Formula: C21H27N3O3
Exact Mass: 369.2052
Molecular Weight: 369.465
Elemental Analysis: C, 68.27; H, 7.37; N, 11.37; O, 12.99

Synonym: R 77975; R-77975; R77975; R77,975; R 77,975; R-77,975; Pirodavir.

IUPAC/Chemical Name: Ethyl p-(2-(1-(6-methyl-3-pyridazinyl)-4-piperidyl)ethoxy)benzoate


InChi Code: InChI=1S/C21H27N3O3/c1-3-26-21(25)18-5-7-19(8-6-18)27-15-12-17-10-13-24(14-11-17)20-9-4-16(2)22-23-20/h4-9,17H,3,10-15H2,1-2H3


Technical Data

Solid powder

>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).

Soluble in DMSO

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:


1: Lacroix C, Laconi S, Angius F, Coluccia A, Silvestri R, Pompei R, Neyts J, Leyssen P. In vitro characterisation of a pleconaril/pirodavir-like compound with potent activity against rhinoviruses. Virol J. 2015 Jul 14;12:106. doi: 10.1186/s12985-015-0330-4. PubMed PMID: 26169596; PubMed Central PMCID: PMC4501209.

2: Bernard A, Lacroix C, Cabiddu MG, Neyts J, Leyssen P, Pompei R. Exploration of the anti-enterovirus activity of a series of pleconaril/pirodavir-like compounds. Antivir Chem Chemother. 2015 Apr;24(2):56-61. doi: 10.1177/2040206615589035. Epub 2015 Jun 11. PubMed PMID: 26071135.

3: Barnard DL, Hubbard VD, Smee DF, Sidwell RW, Watson KG, Tucker SP, Reece PA. In vitro activity of expanded-spectrum pyridazinyl oxime ethers related to pirodavir: novel capsid-binding inhibitors with potent antipicornavirus activity. Antimicrob Agents Chemother. 2004 May;48(5):1766-72. PubMed PMID: 15105133; PubMed Central PMCID: PMC400527.

4: Rombaut B, Andries K, Boeyé A. Stabilisation of poliovirus with pirodavir. Dev Biol Stand. 1996;87:173-80. PubMed PMID: 8854015.

5: Hayden FG, Hipskind GJ, Woerner DH, Eisen GF, Janssens M, Janssen PA, Andries K. Intranasal pirodavir (R77,975) treatment of rhinovirus colds. Antimicrob Agents Chemother. 1995 Feb;39(2):290-4. PubMed PMID: 7726484; PubMed Central PMCID: PMC162529.

6: Hayden FG, Andries K, Janssen PA. Safety and efficacy of intranasal pirodavir (R77975) in experimental rhinovirus infection. Antimicrob Agents Chemother. 1992 Apr;36(4):727-32. PubMed PMID: 1503435; PubMed Central PMCID: PMC189373.

7: Andries K, Dewindt B, Snoeks J, Willebrords R, van Eemeren K, Stokbroekx R, Janssen PA. In vitro activity of pirodavir (R 77975), a substituted phenoxy-pyridazinamine with broad-spectrum antipicornaviral activity. Antimicrob Agents Chemother. 1992 Jan;36(1):100-7. PubMed PMID: 1317142; PubMed Central PMCID: PMC189235.