| kipukasins, nucleoside derivatives from aspergillus versicolor. | seven new aroyl uridine derivatives (kipukasins a-g; 1-7) were isolated from solid-substrate fermentation cultures of two different hawaiian isolates of aspergillus versicolor. the structures of compounds 1-7 were determined by analysis of nmr and ms data. the nucleoside portion of lead compound 1 was assigned as uracil-1-beta-d-ribofuranoside by spectral comparison with an authentic standard. the bioactivity of the original a. versicolor extracts was accounted for mainly by the presence of the ... | 2007 | 17608440 |