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Reactions of the melatonin metabolite AMK (N1‐acetyl‐5‐methoxykynuramine) with reactive nitrogen species: Formation of novel compounds, 3‐acetamidomethyl‐6‐methoxycinnolinone and 3‐nitro‐AMK
Abstract:  The melatonin metabolite N1‐acetyl‐5‐methoxykynuramine (AMK) was found to be unstable in air when adsorbed on a thin‐layer silica gel chromatography plate, a result that is in goodExpand
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  • Open Access
Aqabamycins A–G: novel nitro maleimides from a marine Vibrio species: II. Structure elucidation*
The structures of secondary metabolites with antibacterial and cytotoxic activities produced by a marine Vibrio strain from the Red Sea were elucidated. Aqabamycin A (1a) and seven furtherExpand
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Furan oligomers and beta-carbolines from terrestrial streptomycetes.
2,5-Bis(hydroxymethyl)furan monoacetate (3) and 2,5-bis(hydroxymethyl)furan diacetate (4) were obtained as new natural products from an ethyl acetate extract of the terrestrial Streptomyces sp.Expand
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Niruriflavone, a New Antioxidant Flavone Sulfonic Acid from Phyllanthus niruri
A new flavone sulfonic acid 1 named niruriflavone was isolated from the 70% ethanolic extract of the whole plant of Phyllanthus niruri (Euphorbiaceae), together with 6,10,14-trimethyl-2-Expand
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  • Open Access
Bhimamycin A to approximately E and bhimanone: isolation, structure elucidation and biological activity of novel quinone antibiotics from a terrestrial Streptomycete.
From the ethyl acetate extract of a terrestrial Streptomycete isolate, five new quinone antibiotics, bhimamycin A (2a), B (2b), C (3c), D (5a), E (7) and the new tetralone bhimanone (8) were isolatedExpand
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Isolation, Structure Elucidation and Activity of Anthracycline Acetates from a Terrestrial Streptomyces sp.
The red coloured ethyl acetate extract of the Streptomyces sp. isolate GW37/3236 delivered the two new antibiotics 13-O-acetyl-bisanhydro-13-dihydrodaunomycinone (3c) and 4,13-O-diacetylbisanhydro-Expand
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Kettapeptin: Isolation, Structure Elucidation and Activity of a New Hexadepsipeptide Antibiotic from a Terrestrial Streptomyces sp.
The ethyl acetate extract of the Streptomyces sp. isolate GW99/1572 exhibited significant biological activity against Gram-positive bacteria and delivered kettapeptin (1), a new hexadepsipeptideExpand
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Bhimamycin A-E and Bhimanone : Isolation, Structure Elucidation and Biological Activity of Novel Quinone Antibiotics from a Terrestrial Streptomycete
: From the ethyl acetate extract of a terrestrial Streptomycete isolate, five new quinone antibiotics, bhimamycin A (2a), B (2b), C (3c), D (5a), E (7) and the new tetralone bhimanone (8) wereExpand
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Halichondria sulfonic acid, a new HIV-1 inhibitory guanidino-sulfonic acid, and halistanol sulfate isolated from the marine sponge Halichondria rugosa Ridley & Dendy
A new sulfur-containing guanidino derivative, halichondria sulfonic acid (1) showing anti-HIV-1 activity, and halistanol trisulfate (2) with anti-tumor activity have been isolated from the marineExpand
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  • Open Access