Y. Usami

Publications122
h-index23
Citations1,730
Highly Influential Citations34
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Cytotoxic substances produced by a fungal strain from a sponge: physico-chemical properties and structures.
Five novel metabolites, trichodenones A-C (1-3), harzialactone A (4) and B (5), have been isolated together with known R-mevalonolactone (6) from the culture broth of a strain of Trichoderma…
Antineoplastic agents. 551. Isolation and structures of bauhiniastatins 1-4 from Bauhinia purpurea.
TLDR
Bioassay-guided separation of extracts prepared from the leaves, stems, and pods of Bauhinia purpurea led to the isolation of four new dibenz[b,f]oxepins named bauhiniastatins 1-4, as well as the known and related pacharin as cancer cell growth inhibitors.
Communesins, cytotoxic metabolites of a fungus isolated from a marine alga
New dioxopiperazine metabolites from a Fusarium species separated from a marine alga.
Antitumor agents. 261. 20(S)-protopanaxadiol and 20(s)-protopanaxatriol as antiangiogenic agents and total assignment of (1)H NMR spectra.
TLDR
This report is the first to completely assign the (1)H NMR signals of 2, together with correction of data for 1 from prior reports, and report the complete and unambiguous assignment of 1 and 2, based on analyses of 2D NMR spectra.
Histamine H3 receptor antagonist OUP-186 attenuates the proliferation of cultured human breast cancer cell lines.
Occurrence of a pig respiratory disease associated with swine influenza A (H1N2) virus in Tochigi Prefecture, Japan.
TLDR
It is considered that Japanese SIV (H1N2) has established an independent stable lineage and participated in infecting pig populations as one of the factors of the pig respiratory disease complex and consistent surveillance would contribute to clarifying the prevalence of dominant SIVs.
Fumiquinazolines, novel metabolites of a fungus isolated from a saltfish
Anthcolorins A–F, novel cytotoxic metabolites from a sea urchin-derived Aspergillus versicolor
A cytotoxic principle of the brown alga Sargassum tortile and structures of chromenes
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