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Obituary
Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Short Paper | Regular issue | Vol 100, No. 10, 2020, pp.1686-1693
Published online, 7th August, 2020
Published online, 7th August, 2020
DOI: 10.3987/COM-20-14320
■ Ukixanthomycin A: A Hexacyclic Xanthone from the Mudflat-Derived Actinomycete Streptomyces sp.
Yuhei Koyanagi, Teppei Kawahara, Yuki Hitora, and Sachiko Tsukamoto*
*Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-hon-machi, Kumamoto 862-0973, Japan
Abstract
A new hexacyclic xanthone, ukixanthomycin A (1), was isolated from the mudflat-derived Streptomyces sp. HGMA004 by screening based on chemical analysis by UPLC-HRMS with our in-house actinomycete extract library. The structure of 1 was elucidated by spectral analyses and quantum chemical calculations. Compound 1 showed weak antifungal activity against Candida albicans.
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