Syntheses of damnacanthal, damnacanthol, norjuzunal and norjuzunol, the coloring matters of Damnacanthus spp. were described. The structures of juzunal and juzunol were synthetically established respectively as 2-formyl-and 2-hydroxymethyl-1-methoxy-3, 5-dihydroxyanthraquinone. These pigments are the first example of 1, 3, 5-trihydroxyanthraquinones occurring in nature.
No takes yet. Share an insight, caveat, or question.
Yoshio Hirose (1960) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: