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Three Diketopiperazine Alkaloids with Spirocyclic Skeletons and One Bisthiodiketopiperazine Derivative from the Mangrove-Derived Endophytic Fungus Penicillium brocae MA-231.
Four new diketopiperazines including spirobrocazines A-C (1-3) and brocazine G (4) were characterized from the mangrove-derived Penicillium brocae MA-231. Compounds 1 and 2 had a 6/5/6/5/6 cyclicExpand
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An enzymatic [4+2] cyclization cascade creates the pentacyclic core of pyrroindomycins.
The [4+2] cycloaddition remains one of the most intriguing transformations in synthetic and natural products chemistry. In nature, however, there are remarkably few enzymes known to have thisExpand
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New Austalides from the Sponge-Associated Fungus Aspergillus sp.†
Chromatographic separation of a crude extract obtained from the fungus Aspergillus sp., isolated from the Mediterranean sponge Tethya aurantium, yielded five new meroterpenoid metabolites, austalidesExpand
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Curvularin-type metabolites from the fungus Curvularia sp. isolated from a marine alga.
Two new curvularin-type macrolides, curvulone A (1) and B (2), and two known ones (3a, 4) of the rare 15R series have been isolated from the fungus Curvularia sp., which has been isolated from theExpand
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Diketopiperazine alkaloids from a mangrove rhizosphere soil derived fungus Aspergillus effuses H1-1.
Effusin A (1), a spirobicyclic N,O-acetal derivative with an unprecedented 3',3a',5',6'-tetrahydrospiro[piperazine-2,2'-pyrano[2,3,4-de]chromene] ring system, and a spiro-polyketide-diketopiperazineExpand
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Structure, absolute configuration, and conformational study of 12-membered macrolides from the fungus Dendrodochium sp. associated with the sea cucumber Holothuria nobilis Selenka.
Dendrodolides A-M (1-13), 13 new 12-membered macrolides, were isolated from Dendrodochium sp., a fungus associated with the sea cucumber Holothuria nobilis Selenka, which was collected from the SouthExpand
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N-N-Coupled Indolo-sesquiterpene Atropo-Diastereomers from a Marine-Derived Actinomycete
Four new indolo-sesquiterpenes dixiamycins A (1) and B (2), oxiamycin (3), and chloroxiamycin (4) were isolated from a marine-derived Actinomycete and characterized, together with the known compoundExpand
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X‐ray Structure Determination, Absolute Configuration and Biological Activity of Phomoxanthone A
The dimeric xanthone phomoxanthone A (1a), a cytochalasin L-696,474 (2a), the corresponding 21-O-deacetyl-L-696,474 (2b), and 3-nitropropionic acid (3) were isolated from the endophytic fungusExpand
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New Bioactive 2,3‐Epoxycyclohexenes and Isocoumarins from the Endophytic Fungus Phomopsis sp. from Laurus Azorica
Six new metabolites, namely cycloepoxylactone (1a), cycloepoxytriol A (2), cycloepoxytriol B (3) and phomolactones A–C (4–6), were isolated from two cultures of the ethyl acetate soluble fraction ofExpand
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Varioxepine A, a 3H-oxepine-containing alkaloid with a new oxa-cage from the marine algal-derived endophytic fungus Paecilomyces variotii.
A new 3H-oxepine-containing alkaloid, varioxepine A (1), characterized by a structurally unprecedented condensed 3,6,8-trioxabicyclo[3.2.1]octane motif, was isolated from the marine algal-derivedExpand
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