151928-32-4

WIN 66306 is a cyclic heptapeptide antagonist of neurokinin-1 (NK1) and NK2 receptors originally isolated from A. flavipes. It binds to NK1 and NK2 receptors and inhibits contractions induced by substance P in isolated guinea pig ileum in a concentration-dependent manner.

WIN 66306 is a cyclic heptapeptide that can be isolated from an Aspergillus species. WIN 66306 is a neurokinin antagonist with antagonistic effects on both NK1 and NK2 receptors[1][2].

[1] Barrow CJ, et al. WIN 66306, a new neurokinin antagonist produced by an Aspergillus species: fermentation, isolation and physico-chemical properties. J Antibiot (Tokyo). 1994 Nov;47(11):1182-7. DOI:10.7164/antibiotics.47.1182
[2] Barrow C J, et al. Structure, determination, pharmacological evaluation, and structure-activity studies of a new cyclic peptide substance P antagonist containing the new amino acid 3-prenyl-. beta.-hydroxytyrosine isolated from Aspergillus flavipes[J]. Journal of medicinal chemistry, 1994, 37(3): 356-363. DOI:10.1021/jm00029a007