Fenleuton

Fenleuton
Clinical data
Trade names	Lofrin
ATC code	none;
Identifiers
	IUPAC name 1-{4-[3-(4-Fluorophenoxy)phenyl]-3-butyn-2-yl}-1-hydroxyurea;
CAS Number	141579-54-6 ;
ChemSpider	65045 ;
UNII	LG64454O6I ;
KEGG	D04151 ;
CompTox Dashboard (EPA)	DTXSID40869916 ;
Chemical and physical data
Formula	C17H15FN2O3
Molar mass	314.316 g·mol−1
3D model (JSmol)	Interactive image ;
	SMILES CC(C#Cc1cccc(c1)Oc2ccc(cc2)F)N(C(=O)N)O;
	InChI InChI=InChI=1S/C17H15FN2O3/c1-12(20(22)17(19)21)5-6-13-3-2-4-16(11-13)23-15-9-7-14(18)8-10-15/h2-4,7-12,22H,1H3,(H2,19,21); Key:MWXPQCKCKPYBDR-UHFFFAOYSA-N;

Last updated January 03, 2026

Fenleuton (trade name Lofrin) is a drug that acts as a 5-lipoxygenase inhibitor and inhibits leukotriene (LTB4, LTC4, LTD4, and LTE4) formation. It has been studied for potential use in veterinary medicine to treat respiratory diseases such as chronic obstructive pulmonary disease (COPD) in horses.^[2]

References

↑ "1-{4-[3-(4-Fluorophenoxy)phenyl]-3-butyn-2-yl}-1-hydroxyurea". chemspider.com. Retrieved 24 December 2015.
↑ Marr KA, Lees P, Page CP, Cunningham FM (1998). "Effect of the 5-lipoxygenase inhibitor, fenleuton, on antigen-induced neutrophil accumulation and lung function changes in horses with chronic obstructive pulmonary disease". J Vet Pharmacol Ther. 21 (3): 241–246. doi:10.1046/j.1365-2885.1998.00127.x. PMID 9673966.

This drug article relating to the respiratory system is a stub. You can help Wikipedia by expanding it.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.

[1] "1-{4-[3-(4-Fluorophenoxy)phenyl]-3-butyn-2-yl}-1-hydroxyurea". chemspider.com. Retrieved 24 December 2015.

[2] Marr KA, Lees P, Page CP, Cunningham FM (1998). "Effect of the 5-lipoxygenase inhibitor, fenleuton, on antigen-induced neutrophil accumulation and lung function changes in horses with chronic obstructive pulmonary disease". J Vet Pharmacol Ther. 21 (3): 241–246. doi:10.1046/j.1365-2885.1998.00127.x. PMID 9673966.

[1]

[2]