The Journal of Antibiotics
Online ISSN : 1881-1469
Print ISSN : 0021-8820
ISSN-L : 0021-8820
WIN 66306, A NEW NEUROKININ ANTAGONIST PRODUCED BY AN Aspergillus species: FERMENTATION, ISOLATION AND PHYSICO-CHEMICAL PROPERTIES
COLIN J. BAROWDAVID M. SEDLOCKHAO H. SUNRAYMOND COOPERAMANDA M. GILLUM
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1994 Volume 47 Issue 11 Pages 1182-1187

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Abstract

WIN 66306 (1a), a cyclic peptide containing a novel amino acid, was isolated as a neurokinin antagonist from an Aspergillus species, labelled SC230. Conditions that maximized the production of 1a were developed, leading also to production of the related compound WIN 68577 (2) and rosellichalasin (3). Both 2 and 3 were more active in the rat NK1 than in the human NK1 receptor binding assay, while 1a was more active at the human receptor with an inhibitor affinity constant of 7 μm.

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© Japan Antibiotics Research Association
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