%0 Journal Article %A Freeman, PW %A Murphy, ST %A Nemorin, JE %A Taylor, WC %T The constituents of Australian Pimelea species. II. The isolation of unusual flavones from P. simplex and P. decora %J Australian Journal of Chemistry %D 1981/08/01 %V 34 %N 8 %P 1779-1784 %K %R https://doi.org/10.1071/CH9811779 %U https://www.publish.csiro.au/paper/CH9811779 %X Extraction of Pimelea simplex F. Muell. and P. decora Domin. has yielded flavone and several methoxyflavones of unusual oxygenation patterns: 2'-methoxyflavone and 7-methoxyflavone from P. simplex, and 3'-methoxyflavone, 6-methoxyflavone, 3',6-dimethoxyflavone and 2',3',6- trimethoxyflavonefrom P. decora. The structures of the substances were confirmed by synthesis from the corresponding chalcones. The 13C n.m.r, spectral data of the flavones and chalcones are tabulated.