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Ezoaminuroic acid, 3-amino-3,4-dideoxy-(=D)-xylo-hexopyranuroic acid, as a constituent of ezomycins A1 and A2

✍ Scribed by Kanzo Sakata; Akira Sakurai; Saburo Tamura

Publisher: Elsevier Science
Year: 1974
Tongue: French
Weight: 248 KB
Volume: 15
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)93129-6

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✦ Synopsis

Ezomycins are antifungal antibiotics produced by a Streptomyces. They inhibit specifically the growth of very limited species of phytopathogenic fungi such as Sclerotinia and Botrytis. Previously we elucidated that ezomycins Al and Bl' the main active components of the group, are new peptidyl nucleosides containing &-cystathionine. 1) In this paper we wish to report the structure of a novel aminodeoxyuronic acid named ezoaminuroic acid 1 which was isolated from ezomycins Al and A2. On hydralysis with Dowex SOW (H+) at 100' under a stream of N2 for 5 hr, ezomycin Al, [a], 22 +13.S" (c=l.OS, water), C26H40NgS016 afforded h-cystathionine and ezomycin A2, [a], l6 +44.4O (c=l.O, 0.2N NaOH), C19H2gN6013, as main products.

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