Potent poisonous compounds from Elaeodendron croceum

Cytotoxicity activity of isolated compounds from Elaeodendron transvaalense ethanol extract

Five known compounds, four triterpenoids [(lup-20(30)-ene-3 ,29-diol (1), lup-20(29)-ene-30-hydroxy-3one-(2), – taraxastanonol 3, -sitosterol 4] and 4’ –Omethylepigallocatechin 5 were isolated from Elaeodendron transvaalense bark ethanol extract. This plant is traditionally used in Southern Africa for the treatment of various ailments including sexually associated diseases. Cytotoxicity of the ...

Anti-HIV activity of compounds isolated from Elaeodendron transvaalense

Identification of potent nanobodies to neutralize the most poisonous polypeptide from scorpion venom.

Scorpion venom, containing highly toxic, small polypeptides that diffuse rapidly within the patient, causes serious medical problems. Nanobodies, single-domain antigen-binding fragments derived from dromedary heavy-chain antibodies, have a size that closely matches that of scorpion toxins. Therefore these nanobodies might be developed into potent immunotherapeutics to treat scorpion envenoming....

Hypoxysordarin, a new sordarin derivative from Hypoxylon croceum.

Hypoxysordarin (1), a new sordarin derivative, was isolated from the fermentation broth of the facultative marine Hypoxylon croceum together with a new gamma-lactone, hypoxylactone (2) and sordarin (3). The structures were determined by spectroscopic methods. Sordarin (3) has previously been isolated from the terrestrial Sordaria araneosa (Sordariaceae). Like the parent compound hypoxysordarin ...

Isoprenylated Phenolic Compounds from Morus macroura as Potent Tyrosinase Inhibitors.

Three new Diels-Alder adducts, macrourins E - G (1: -3: ), one new 2-arylbenzofuran, macrourin H (4: ), and eight known Diels-Alder adducts (5: -12: ) were isolated from Morus macroura. Their structures were elucidated through extensive analysis of spectroscopic data. The 1H NMR and ECD trends in the determination of the configurations of these Diels-Alder adducts were summarized. The tyrosinas...