Metabolites of Dactylaria lutea. The structures of dactylariol and the antiprotozoal antibiotic dactylarin.

The metabolites of the predacious fungus Dactylaria lutea ROUTIEN include the anthraquinone macrosporin (2) and three hydroxylated 1,2,3,4-tetrahydro derivatives of this anthraquinone, altersolanol A (5), altersolanol B (4) and dactylariol (6). The structure and relative configuration of dactylariol are established from spectroscopic studies, and its absolute configuration is proposed as 1R, 2R, 3R by virtue of its co-occurrence with altersolanol B. Dactylarin, suggested by other authors to have the structure (1), is shown to be identical with altersolanol B (4).