
%0 Journal Article
%A Cooke, RG 
%A Dagley, IJ 
%T Colouring Matters of Australian Plants. XXI. Naphthoxanthenones in the Haemodoraceae
%J Australian Journal of Chemistry
%D 1979/08/01
%V 32
%N 8
%P 1841-1847
%K 
%R https://doi.org/10.1071/CH9791841
%U https://www.publish.csiro.au/paper/CH9791841 
%X Two new pigments, haemofluorone A and haemofluorone B, have been isolated from the flowers of Macropidia fuliginosa Drum. and also from the root system of Phlebocarya ciliata R.Br. Spectroscopic analysis indicates the structures 5,8,9- and 8,9,11-trihydroxy-lH-naphtho[2,1,8-mna]xanthen-l-one. The former structure has been confirmed by a synthesis of the trimethyl ether by photochemical oxidative cyclization of 9-(3,4-dimethoxyphenyl)-6-hydroxy-2-methoxy-1H-phenalen-1-one.The parent chromophore, 1H-naphtho[2,1,8-mnalxanthen-1-one, and the 2,5-dimethoxy derivative have also been prepared by analogous photochemical reactions of the appropriate arylphenalenones. 
