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Sterostreins F-O (1-10), 10 illudalanes and norilludalanes, were isolated from cultures of the Basidiomycete Stereum ostrea BCC 22955. Their structures were elucidated by analyses of the NMR spectroscopic and mass spectrometry data. Sterostreins M (8), N (9), and O (10) are pyridine-containing illudalanes.
A new cyclohexadepsipeptide, conoideocrellide A (1), its linear derivatives, conoideocrellides B-D (2-4), three new hopane triterpenoids (5-7), two new bioxanthracenes (9 and 10), and a new isocoumarin glycoside (13) were isolated from the scale insect pathogenic fungus Conoideocrella tenuis BCC 18627. Biological activities of the new compounds were… (More)
UNLABELLED This study assessed the application of photocatalytic oxidation (PCO) to the high efficiency particulate air (HEPA) filter for disinfection of airborne microorganisms. Experiments were conducted at two TiO2 loadings (1870 +/- 169 and 3140 +/- 67 mg/m(2)) on the HEPA filter irradiated with UV-A at the intensity of 0.85 +/- 0.18 or 4.85 +/- 0.09… (More)
Optimal fermentation conditions for enniatin production using the entomopathogenic fungus Verticillium hemipterigenum BCC 1449 have been investigated. Among various liquid media tested, highest efficiency of enniatin production was achieved by fermentation in yeast extract sucrose. Application of this condition to large-scale fermentation resulted in the… (More)
Three new 10-membered macrolides (1-3) have been isolated from the entomopathogenic fungus Cordyceps militaris BCC 2816, together with six known compounds, cepharosporolides C (4), E (5), and F (6), 2-carboxymethyl-4-(3'-hydroxybutyl)furan (7), cordycepin (8), and pyridine-2,6-dicarboxylic acid. The structures were determined by analysis of NMR data, and an… (More)
Torrubiellones A-D (1-4), new pyridone and tetramic acid alkaloids, were isolated from the spider pathogenic fungus Torrubiella sp. BCC 2165. Torrubiellone A (1) exhibited antimalarial activity with an IC(50) value of 8.1 μM, while it showed very weak cytotoxic activity.
Two new ascochlorin derivatives, nectchlorins A (1) and B (2), together with eight known compounds (3-10), were isolated from cultures of the leafhopper pathogen Microcera sp. BCC 17074. The structures were elucidated on the basis of NMR spectroscopic and mass spectrometry data. The absolute configuration of 2 was determined by application of the modified… (More)
An antimalarial macrocyclic polylactone, menisporopsin A (1), was isolated from a cell extract of the seed fungus Menisporopsis theobromae. The structure of 1 was elucidated on the basis of spectroscopic analysis and chemical transformations, with the absolute configuration established by application of the modified Mosher method and by using chiral HPLC.… (More)
AIMS This work aimed to optimize the culture conditions for production of a novel and potent anti-tubercular alkaloid, hirsutellone A, by the saprophytic soil fungus Trichoderma gelatinosum BCC 7579. METHODS AND RESULTS The fungus was initially cultured in shake flasks at 25 degrees C in the potato dextrose broth (PDB) supplemented with various carbon and… (More)