| antiinsectan decaturin and oxalicine analogues from penicillium thiersii. | three new oxalicine and decaturin analogues (6-8) have been isolated from organic extracts of penicillium thiersii, along with the known compounds oxalicines a and b. these compounds (4-8) are members of a group of unique natural products containing terpenoid and pyridine moieties. the structures of the new compounds were elucidated by analysis of nmr and ms data. most of these metabolites exhibit potent antiinsectan activity against the fall armyworm (spodoptera frugiperda). | 2005 | 15787428 |
| novel antiinsectan oxalicine alkaloids from two undescribed fungicolous penicillium spp. | 15-deoxyoxalicine b (1) and decaturins a (2) and b (3) have been isolated from penicillium decaturense and penicillium thiersii, two previously undescribed species obtained as colonists of wood-decay fungi. the structures were determined by 2d nmr experiments and/or single-crystal x-ray diffraction analysis. these compounds are members of a rare structural class, and decaturins a and b feature a new polycyclic ring system. decaturin b (3) exhibited potent antiinsectan activity against the fall a ... | 2003 | 12605512 |
| penicillium thiersii, penicillium angulare and penicillium decaturense, new species isolated from wood-decay fungi in north america and their phylogenetic placement from multilocus dna sequence analysis. | we describe three new fungicolous species on the basis of phenotypic and phylogenetic differences from known species. penicillium thiersii, p. angulare and penicillium decaturense are described. penicillium thiersii phenotypically is identified on the basis of several characteristics including growth rates, vesicle size and condium shape and roughening. penicillium angulare is related most closely to p. adametzioides but differs from it by restricted growth rates and conidiophores greater than 6 ... | 2010 | 21148952 |
| thiersindoles a-c: new indole diterpenoids from penicillium thiersii. | three new 3-substituted indole diterpenoids (thiersindoles a-c; 1-3) have been isolated from organic extracts of a new penicillium species (p. thiersii). their structures, including absolute stereochemistry, were determined by analysis of nmr data and application of mosher's method. thiersindoles a-c are biogenetically related to the aflavinines, although the [6,6,5] tricyclic diterpenoid skeleton in compounds 1 and 2 is unprecedented in any of the known members of this class. | 2003 | 14510604 |