N. Tanaka et al., FOMITELLIC ACIDS, TRITERPENOID INHIBITORS OF EUKARYOTIC DNA-POLYMERASES FROM A BASIDIOMYCETE, FOMITELLA-FRAXINEA, Journal of natural products, 61(2), 1998, pp. 193-197
Four new triterpenoid compounds, 1-4, were isolated from the mycelium
of a basidiomycete, Fomitella fraxinea, and their structures determine
d by spectroscopic analyses. Compounds 1-5 inhibited calf DNA polymera
se alpha and rat DNA polymerase beta, with respective minimum inhibito
ry concentration (MIC) ranges of 35-75 and 90-130 mu M.