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Cottoquinazoline A and cotteslosins A and B, metabolites from an Australian marine-derived strain of Aspergillus versicolor.
An Australian marine-derived isolate of Aspergillus versicolor (MST-MF495) yielded the known fungal metabolites sterigmatocystin, violaceol I, violaceol II, diorcinol, (-)-cyclopenol, and
Citromycetins and bilains A-C: new aromatic polyketides and diketopiperazines from Australian marine-derived and terrestrial Penicillium spp.
TLDR
The structures for the Penicillium metabolites 1- 18 were assigned by a combination of detailed spectroscopic analysis, including correlation with relevant literature data, chemical derivatization, degradation, and biosynthetic considerations.
Ontogenetic Variation in the Chemical Defenses of Cane Toads (Bufo marinus): Toxin Profiles and Effects on Predators
TLDR
The results suggest a dramatic ontogenetic shift in the danger that toads pose to native predators, reflecting rapid changes in the types and amounts of toxins during toad development.
Long-term quantification of the release of monomers from dental resin composites and a resin-modified glass ionomer cement.
TLDR
This study quantified the release of monomers from polymerized specimens of four commercially available resin composites and one glass ionomer cement immersed in water:ethanol solutions in a bid to understand the effect of resin composition on human genes, cells, or tissues.
Exploitation of an ant chemical alarm signal by the zodariid spider Habronestes bradleyi Walckenaer
TLDR
A novel form of exploitation of an ant alarm pheromone by the cursorial spider Habronestes bradleyi (Zodariidae), a specialist predator of the highly territorial and aggressive meat ant Iridomyrmex purpureus, is revealed.
Brevianamides with antitubercular potential from a marine-derived isolate of Aspergillus versicolor.
TLDR
Aspergillus versicolor isolated from sediment collected from the Bohai Sea, China, yielded the new dimeric diketopiperazine brevianamide S, suggestive of a new mechanism of action that could inform the development of next-generation antitubercular drugs.
A search for BACE inhibitors reveals new biosynthetically related pyrrolidones, furanones and pyrroles from a southern Australian marine sponge, Ianthella sp.
TLDR
The ianthellidones were non-cytotoxic towards two human colon cancer cell lines, as well as Gram +ve and Gram -ve bacteria, and a fungus, and Structures for all Ianthella metabolites were determined by detailed spectroscopic analysis, supported by a plausible biosynthetic relationship.
Naseseazines A and B: a new dimeric diketopiperazine framework from a marine-derived actinomycete, Streptomyces sp.
Chemical analysis of a Streptomyces sp. (CMB-MQ030) isolated from a Fijian marine sediment yielded two new diketopiperazines, naseseazines A and B (1, 2), featuring a new dimeric framework.
Onnamide F: a new nematocide from a southern Australian marine sponge, Trachycladus laevispirulifer.
TLDR
A southern Australian marine sponge, Trachycladus laevispirulifer, has yielded a potent new nematocide with antifungal activity which has been identified as onnamide F, a common structural motif previously described in a number of natural products exhibiting interesting pharmacological activities.
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