Search Results - "YOSHIDA, Wesley Y."
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New Nostocyclophanes from Nostoc linckia
Published in Marine drugs (31-01-2023)“…Six new nostocyclophanes and four known compounds have been isolated from (Nostocaceae) cyanobacterial strain UTEX B1932. The new compounds, nostocyclophanes…”
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Heterocycles Derived from Generating Monovalent Pnictogens within NCN Pincers and Bidentate NC Chelates: Hypervalency versus Bell-Clappers versus Static Aromatics
Published in Organometallics (13-08-2018)“…Generating monovalent pnictogens within NCN pincers has resulted in the isolation of three distinct types of 1,2-azaheteroles, highly aromatic nitrogen…”
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3
Tolyporphins L–R: Unusual Tetrapyrroles from a Brasilonema sp. of Cyanobacterium
Published in Journal of organic chemistry (17-01-2020)“…Tolyporphins L–R (2–8) have been isolated from a mixed cyanobacterium-microbial culture. The structures of tolyporphins L and M have been revised to four…”
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4
Potential anti-inflammatory phenolic glycosides from the medicinal plant Moringa oleifera fruits
Published in Bioorganic & medicinal chemistry (01-09-2010)“…Bioassay-guided isolation and purification of the ethyl acetate extract of Moringa oleifera fruits yielded three new phenolic glycosides; 4-[(2′- O-acetyl-α-…”
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Pregnane-10,2-carbolactones from a Hawaiian Marine Sponge in the Genus Myrmekioderma
Published in Journal of natural products (Washington, D.C.) (27-05-2016)“…Four new pregnanes, 3β,4β-dihydroxy-17-methyl-17α-pregna-5,13-diene-10,2-carbolactone (1),…”
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6
Post-translational Modification in Microviridin Biosynthesis
Published in Chembiochem : a European journal of chemical biology (15-12-2008)“…Cyanobacteria are prolific producers of bioactive natural products that mostly belong to the nonribosomal peptide and polyketide classes. We show here how a…”
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Cytotoxic Sesquiterpenoid Quinones and Quinols, and an 11-Membered Heterocycle, Kauamide, from the Hawaiian Marine Sponge Dactylospongia elegans
Published in Marine drugs (19-07-2019)“…Several known sesquiterpenoid quinones and quinols ( - ), and kauamide ( ), a new polyketide-peptide containing an 11-membered heterocycle, were isolated from…”
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Neopetrocyclamines A and B, Polycyclic Diamine Alkaloids from the Sponge Neopetrosia cf exigua
Published in Journal of natural products (Washington, D.C.) (27-03-2015)“…Two new polycyclic alkaloids, neopetrocyclamines A and B (1 and 2), along with the known metabolites papuamine (3) and haliclonadiamine (4), were isolated from…”
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9
Streamlined Preparation and Coordination Chemistry of Hybrid Phosphine–Phosphaalkene Ligands
Published in Organometallics (28-03-2016)“…A rationally designed and selective synthesis of hybrid phosphine–phosphaalkene ligands E -1a (Cy2PCH2CHPMes*, Mes* = 2,4,6-tri-tert-butylphenyl) and E -1b…”
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10
Synthesis of a Tris(phosphaalkene)phosphine Ligand and Fundamental Organometallic Reactions on Its Sterically Shielded Metal Complexes
Published in Organometallics (11-07-2016)“…A new tris(phosphaalkene)phosphine ligand (1) was synthesized via phospha-Wittig methodology. Metalation of 1 with [RhCl(C2H4)2]2 and [IrCl(COE)2]2 (COE =…”
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Xestosaprols from the Indonesian Marine Sponge Xestospongia sp
Published in Journal of natural products (Washington, D.C.) (25-06-2010)“…Eight pentacyclic compounds, xestosaprols F−M (1−8), were isolated from a marine sponge belonging to the genus Xestospongia. The structures of these new…”
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Characterization of Leptazolines A–D, Polar Oxazolines from the Cyanobacterium Leptolyngbya sp., Reveals a Glitch with the “Willoughby–Hoye” Scripts for Calculating NMR Chemical Shifts
Published in Organic letters (18-10-2019)“…The bioactivity-guided examination of a Leptolyngbya sp. led to the isolation of leptazolines A–D (1–4), from the culture media, along with two degradation…”
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13
Stictamides A−C, MMP12 Inhibitors Containing 4-Amino-3-hydroxy-5-phenylpentanoic Acid Subunits
Published in Journal of organic chemistry (20-05-2011)“…An extensive study of the secondary metabolites produced by a new Sticta sp. of lichen has led to the isolation of three new compounds containing the…”
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14
Structure of Pseudocerosine, an Indolic Azafulvene Alkaloid from the Flatworm Pseudoceros indicus
Published in Organic letters (05-03-2009)“…The rim of the tunic of the flatworm Pseudoceros indicus is characterized by blue dots on a white background. The isolation and structure elucidation of the…”
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15
A Masked Phosphinidene Trapped in a Fluxional NCN Pincer
Published in Chemistry : a European journal (05-12-2016)“…The trapping of a phosphinidene (R‐P) in an NCN pincer is presented. Stabilized phosphinidene 1 was characterized by 31P{1H}, 1H, and 13C{1H} NMR spectroscopy,…”
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16
More kapakahines from the marine sponge Cribrochalina olemda
Published in Organic letters (01-05-2003)“…Three new kapakahines E-G (1-3) have been isolated from the marine sponge Cribrochalina olemda. Limited quantities of these compounds required not only NMR…”
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Structurally diverse new alkaloids from Palauan collections of the apratoxin-producing marine cyanobacterium Lyngbya sp
Published in Tetrahedron (23-09-2002)“…Various collections of the apratoxin-producing marine cyanobacterium Lyngbya sp. from Palau have afforded several new nitrogenous metabolites. Lyngbyabellin C…”
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Isolation and Structure Determination of Obyanamide, a Novel Cytotoxic Cyclic Depsipeptide from the Marine Cyanobacterium Lyngbya confervoides
Published in Journal of natural products (Washington, D.C.) (01-01-2002)“…Obyanamide (1) was isolated from a variety of the marine cyanobacterium Lyngbya confervoides collected in Saipan, Commonwealth of the Northern Mariana Islands…”
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The Isolation and Structure Elucidation of Tasiamide B, a 4-Amino-3-hydroxy-5-phenylpentanoic Acid Containing Peptide from the Marine Cyanobacterium Symploca sp
Published in Journal of natural products (Washington, D.C.) (01-07-2003)“…A new cytotoxic peptide, which displayed an IC50 value of 0.8 μM against KB cells, has been isolated from the marine cyanobacterium Symploca sp. The planar…”
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Spirovetivane- and Eudesmane-Type Sesquiterpenoids Isolated from the Culture Media of Two Cyanobacterial Strains
Published in Journal of natural products (Washington, D.C.) (25-02-2022)“…As part of a study examining polar metabolites produced by cyanobacterial strains, we examined media extracts of a Calothrix sp. (strain R-3-1) and a Scytonema…”
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